Take a plane to the Ming Dynasty

Chapter 166 Measuring the Walking Vehicle
Zhu Changyuan came, and when he walked to the Yamen of the Ministry of Industry, he was shocked when he saw so many people.

After being guided by the boy in the yamen, he came to the lecture place, and he also saw the huge black wooden board, which was a foot high and a foot wide.

Nima!When Zhu Changyuan asked Li Ji to prepare things, he casually said that it was about ten feet high, but he did not expect that this guy really made a one-foot-high blackboard.

Nima is one foot wide and I can write from one end to the other, but if you make it one foot tall, do you think I am Yao Ming? Even Yao Ming has to worry about his toes, okay?

Forget it, anyway, as long as the board is big enough, don't worry about so much.

Walking to the podium, he took a deep breath to dispel the drowsiness all over his body, looked down the stands, and was suddenly shocked, this lineup was really unexpected.

"It's a pity that the loudspeaker is not used." Zhu Changyuan murmured to himself, and hurried to the audience, greeted everyone, and then walked to the quasi-VIP seats in the second row, saying hello to everyone.

"Hello, Master Li."

"Hello, Master Liu."

"Hello, Master Liu."

Even seeing Cao Huachun coming, said: "Mr. Cao also knows how to count?"

Cao Huachun twirled the orchid and pointed at it, "Our family doesn't know how to count, so we came here to support Zhu Changyuan."

Zhu Changyuan immediately got black lines, you f*cking said that in public, didn't you make me offend this group of Qingliu.Seeing another eunuch next to Cao Huachun, he asked suspiciously, "Who is this?"

Cao Huachun helped to answer: "This is the person next to His Majesty, Prince Wang Cheng'en."

Wang Chengen cupped his hands towards Cao Huachun, and said modestly: "Don't dare, Mr. Cao is my teacher."

Zhu Changyuan exchanged a few words with everyone, and when he retreated to the podium, he saw that several Qingliu looked at him with contempt, but now he can't control so much.

Some people commented below: "This is Zhu Changyuan, the general who stationed troops in Dalinghe and went straight to Shenyang Wei?"

"It should be him."

"Sure enough, he is a talented person."

"To be able to see the general today is not in vain for me to make a trip. In fact, I know how to cut an egg."

"I've seen it a long time ago, you know a bitch, ha ha."

. . .

"Master Zhu."

Just as Zhu Changyuan stepped onto the podium, there was a tall man in his forties waving his hands and yelling at him among the crowd standing below. He looked like a fan.

"Huh?" Zhu Changyuan smiled helplessly, and said, "I don't know what advice this gentleman can give you?"

The man smiled and said humorously: "My lord, your seal is gray, your eyes are slick, and your expression is slack. Did your lord not sleep well last night because he was thinking too much about the issue of circumcision?"

Fuck, it's so fucking amazing, I can see it even if I didn't sleep last night.

Zhu Changyuan admitted with a smile, and said: "Sir, you are truly a god, Zhu did not sleep well last night."

The man laughed loudly, and said: "I'm Li Baohe, an imperial physician from the imperial hospital. After my husband finishes his work, I'm willing to prescribe a prescription for him to recuperate."

"Thank you very much then."

No wonder this guy is so accurate, he turned out to be an imperial doctor, but Nima imperial doctor just went to see a doctor, so why come to me to join in the fun!
The people below laughed loudly, and the atmosphere suddenly melted a lot.

Zhu Changyuan showed a professional and charming smile, and said: "My lords, colleagues, friends, and uh, and the partner on the tree, good morning everyone."

After hearing Zhu Changyuan's words, everyone couldn't help but look back, and they really saw a guy squatting on a branch like a monkey on the tree at the back.

"Hahaha..." There was another burst of laughter.

Zhu Changyuan waved his hand to signal everyone to be calm, and said: "I was a guest in Xu's residence some time ago." Speaking of this, he looked at Xu Ji and Xu Ermo who were sitting in the third row, smiled at them friendly, and said: "Talk to some friends. After learning about the art of cutting circles, and then having an exchange with Mr. Li Ji from the Ministry of Industry, we have today’s analysis class of cutting circles.”

Li Ji blushed a little when he heard what Zhu Changyuan said, but he felt quite honored, at least Zhu Changyuan didn't dismantle him in front of so many people, and even looked at Zhu Changyuan with kinder eyes.

This kid, it looks pretty pleasing to the eye!
"Okay, let's not talk nonsense, let me introduce the basic knowledge of Yuan!" Zhu Changyuan took out his notebook, looked left and right to see if there was no place to put it, and then asked the boy in the yamen to carry over a table, and used it as a lecture table, put the notebook on it and open it, and said: "What is a circle?"

"Xu Guangqi and Xu Ge once translated "The Elements of Geometry", which defines the circle as follows: a circle has a center of equal length. It means that a circle is a line that has a center and other places that are equal to the center of the circle. It's a circle."

When Zhu Changyuan came up, he took out Xu Guangqi's translation of "The Original Geometry" as a classic, and Xu Ji suddenly felt that he had more face. Although he was sitting in the third row, his waist was straight.

After a brief introduction to some basic knowledge of the circle, the explanation of the circle cutting technique began.

Picking up a stylus, I drew a circle on the blackboard. How should I put it, those who knew it knew it was a circle, but those who didn’t know it thought it was an egg. Anyway, it was flat, and it seemed to be a little pointy.

"Okay, this is a circle, now, let's cut its circumference."

Zhu Changyuan hadn't finished speaking, and the following "huh" booed.

There was a lot of discussion.

"This is Yuan? Master Zhu is joking, right?"

"My God, even if you really don't understand, even if you want to be perfunctory, you can't do this, at least draw a perfect circle."

. . .

Cheng Shuzheng, who was sitting at the head of the first row, slapped the table and stood up straight away, pointing to Zhu Changyuan's nose and saying, "Nonsense, it's an insult to my numerology and morality." He raised the abacus in front of him with a "crash", angrily The court Liu Zongzhou and Liu Zunxian saluted, and said: "My lords, please forgive me for being helpless. I will deduce the great art of cutting circles with such people, hehehehe, playing the piano with cows, and talking with chickens and ducks."

Song Yingxing also felt that Zhu Changyuan was a bit too much, no matter what, the circle you drew is not round, how can you cut out a correct circle-to-diameter ratio?

However, as a rigorous scholar, he did not criticize Zhu Changyuan in public.

Just as Zhu Changyuan opened his mouth, he was interrupted, feeling very upset, and said: "I don't know who you are, anyway, I respect your choice, please don't disturb me, please?"

Cao Huachun laughed, and said: "Master Zhu is very true, what he said is very true, the so-called difference of ways does not conspire with each other, Master Zhu has his own method, if you don't understand, don't gossip here and affect our family Listen to class!"

Pretend to understand, but in fact this guy doesn't understand at all, he came here just to show the world that he supports Zhu Changyuan.In fact, eunuchs are also human beings, and they also want to form cliques and make friends, but Ming Dynasty officials all claim to be clean and disdain to be with them.

Some people who are willing to be close to him don't have much talent. After finally befriending Zhu Changyuan, who is talented and has no aversion to eunuchs, Cao Huachun will naturally try hard.

Zhu Changyuan nodded with a smile, and said: "Thank you, Mr. Cao, for your righteous words. Who else is unwilling to listen? You can leave now. Naturally, you can also stay. I don't care about your official position or whether you are from a famous family. Now that you are here, don't leave." make trouble."

After finally calming down the noise of the crowd, he looked back at the circle he had drawn. It was really ugly, so he wiped off the circle with a damp cloth, and said, "Since everyone thinks my drawing is ugly, I can do it again. Don't be so full of gunpowder, okay?"

After finishing speaking, he picked up the pencil and drew a large circle on the blackboard, with a diameter of more than one meter.

Although it is not as exaggerated as the round, flat and pointed one just now, this circle is not much better, because Master Zhu still drew it by hand this time.

"This this..."

What Zhu Changyuan did once again blinded the eyes of many people present.

"Is it much better this time?" Zhu Changyuan boasted to himself after finishing the painting. Looking at Cheng Shuzheng on the left in the first row, he found that this guy hadn't left.

"We all know that Liu Hui, a master of numerology, once recorded in his book "Detailed Explanation of Nine Chapters of Arithmetic": The smaller the cut, the less the loss, and the cut is cut again, so that it cannot be cut, then it fits with the circle, and There is nothing to lose. This is where the meaning of cutting circles lies. In the next 200 years, Zu Chongzhi of the Southern and Northern Dynasties finally cut out the circumference-to-diameter ratio of the small seven numbers (seven decimals), which is what we have today. The three I know well." After a pause, he continued: "One four one five nine two six..."

"Naturally there are data behind the six, but today, we aim to restore Zu Chongzhi's technique of cutting circles, and we will not study the data after the small seven numbers. Therefore, to get the small seven numbers cut by Zu Chongzhi, after many years It takes a total of eleven cuts and 44 steps to go through the hard calculation."

"So, I would venture to guess that Zu Chong's method of cutting circles back then was an eleven-stage circle-cutting technique."

After Zhu Changyuan finished speaking, Cheng Shuzheng stood up, cupped his hands on the stage, sneered, and said, "The circle you drew on the wooden board is at most four feet in diameter. How can you cut it eleven times?"

"Of course it can be cut eleven times!"

Zhu Changyuan smiled slightly.He knew what Cheng Shuzheng was thinking. The art of cutting a circle in the Ming Dynasty was to cut it and then measure it. Of course it wouldn't work. Like the day when Li Ji drew a [-]-foot circle, it was only good enough to measure six or seven. only once.

"Okay." Cheng Shuzheng looked at Zhu Changyuan with a sneer, seeing that he was so confident, he waved his hand and said, "Push it out."

Just hearing the creaking sound coming from the back of the yard, Shaoqing, everyone saw three people pushing out a strange-shaped thing bigger than the grand master's chair at the same time.

"Since Mr. Zhu is so confident, I don't hide my clumsiness." Pointing to the strange thing, he said: "I am not only Cheng Shuzheng, this is a measuring scooter made by my grandfather himself, and I will borrow it for your use today. .”

(End of this chapter)