After a while, Li Zubai's measuring tools from the Qintian Supervision Department were brought.

A wooden box.

Open the wooden box, and there are things that Yang Reform is "familiar with".

Rulers, triangles, and it seems that there are compasses. These things are all necessary tools for math classes in the past! In this way, Yang Gengai remembered the wooden triangle board and wooden ruler that he was a math teacher in elementary school, and if there was chalk and blackboard, hey! Isn't this a return to elementary school days?

Yang Reform is very good. I thought, is this Ming Dynasty mathematics already bullish to such an extent? There is no big difference from modern tools anymore.

Yang Reform's heart is already a huge wave that has turned the sky upside down! Doesn't history class show that the dynasty is dark? Why did these things exist hundreds of years ago, and haven't they advanced for hundreds of years?

Originally, I just wanted to use my knowledge from the 21st century that transcended time and space to tease and tease these scholars and doctors in the Ming Dynasty, but I didn't expect that the Ming Dynasty would come out with such a bullish character to open his eyes.

Yang Gengai couldn't help it, so he asked, "Li Aiqing, what are you holding in your hand?" ”

"Emperor Qi, the name of the minister's hand, the ruler, the triangular ruler, the compass, used to calculate the area of the copper basin, and the amount of water, but also need to use the scale, bucket, paper and pen, the minister is ready." Li Zubai is explaining to Yang Reform in a serious way.

"Uh...... This ......" This time it was Yang Reform's turn to be dumbfounded. Half a ring, and then said: "Li Aiqing, please continue." ”

Li Zubai measured it with the ruler in his hand, then took out the paper and squatted on the ground to write and draw.

Yang Gai saw it and felt that it was inconvenient for him to be like this, so he said to Wang Chengen beside him: "Big companion, seeing that it is inconvenient for him to squat, send him a small stool to use." ”

Wang Chengen personally ran down and moved a small stool for Li Zubai to facilitate Li Zubai's calculation. moved Li Zubai to ......, but also got the jealousy of the ministers, and pink eye attacked. We're all standing, but you're a little stool

After a while, Li Zubai calculated it: "Your Majesty, the minister has calculated, this copper basin is a round mouth, with a diameter of one foot and an area of about seventy-eight square inches...... Li Zubai quickly calculated. [I don't know if it was called square inch in ancient times]

This made Yang Reform, an otaku who reviewed the circular area algorithm in the middle of the night yesterday, unbelievable.

"Seventy-eight square inches? How did you figure it out? On what basis? Yang asked reform.

"Your Majesty, the minister is calculated according to the formula of the circle area, multiply the square of the radius by the pi, and you can get the circle area of the copper basin."

Yang Reform was taken aback, "formula"! The Ming Dynasty has a formula, and I'm ready to show off in the Ming Dynasty, but I didn't expect it. This formula is obviously the formula for calculating the area of the circle (circle area = pi x radius squared) that Yang Gengai dreamed of returning to Baidu yesterday and revisited.

Yang Gai became interested in this, and asked, "Li Aiqing, since you can calculate the area of this basin, you can probably calculate how much water there is." ”

Yang should also prepare to test Li Zubai's other skills.

How do you know that Li Zubai said: "Emperor Qiqi, the weight of this water, as long as you weigh it, you can get the weight." ”

Just weigh it? Yang Reform was speechless. It's as simple as that. I'm also going to calculate the volume and weight according to the density of the water.

"Then, Li Aiqing, you continue." Yang Reform was speechless, he was ready to show his hand, and he also dreamed of going back to Baidu to check the formulas, and he also wrote it down silently, planning to humiliate the Ming Dynasty doctor, but I didn't expect that there was a knowledgeable person. I can't show off now, and I'm very depressed.

As he spoke, Li Zubai took out a small scale, and used a container to weigh the water.

"Your Majesty, the water in this basin weighs about eight taels and two dollars." Li Zubai said. (In the Ming Dynasty, it was 16 taels in a catty.) Eight taels is half a catty...... Half a catty and eight taels, is it a little dizzy, but it is actually the same weight. ）

"Really? In other words, this foot-long round basin has been filled with eight taels of water from last night to now? ”

"Your Majesty, yes, it's about half a catty." Li Zubai said solemnly.

"Uh...... Eight taels ...... How did it become half a catty? The more Yang Gai said, the lower his voice became, and he couldn't understand what was going on, was there something wrong with his ears? Or is there something wrong with this person's head? Half a catty weighs as much as eight taels?

Wang Chengen, who was on the side, listened to the emperor's self-talk, and was making trouble not understanding the problem of eight taels and half a catty, and was also a little surprised, so he hurriedly reminded in a whisper: "Your Majesty, this catty weighs sixteen taels!" ”

"Cut...... Scold...... One pound and sixteen taels?? This ...... "Yang Reform is depressed enough, how can the conversion unit of the Ming Dynasty be different from his original one." Feelings others say "half a catty and eight taels", is the same heavy meaning, I originally thought that this "half a catty eight taels" said about the same weight, are less than a catty, rounded, it is counted as a catty.

"This, Li Aiqing, do the math again, how much rain should fall in this square radius?"

"Your Majesty, a foot radius gets half a pound of water, and a square foot radius gets fifty pounds of water." Li Zubai quickly reported the answer.

"Well, that's right! What about a mile away? How many pounds of water can you get? ”

"Your Majesty, the length of this mile is 150 zhang, so a radius of one mile is about 11 million catties of water." This time, Li Zubai calculated a little longer. At this point, Li Zubai's forehead was already sweating. This kind of "super-scale" number operation, Li Zubai already felt that it was beyond his ability, the numbers written on the paper were already several lines, and the scratch paper had already spent several sheets.

"So, what about this hundred miles? I see that this dark cloud is rolling, and it is not more than a hundred miles. You should count it as a hundred miles. ”

The ministers below are already scared stupid, a hundred miles away? There are 11 million catties of water in a radius of 100 miles...... It's really astronomical.

The ministers below froze, how could there be so much water above our heads? No way? Then why didn't you kill someone when you fell?

Are there really so many?

Fake?

It's true?

Confused! Confused! Indissoluble! Depressed!

The ministers feel that their brains are not enough, how much is this 11 million catties of water? How much paper does it take to write this number on paper?

Li Zubai trembled involuntarily. This kind of supercomputing made him run out of brainpower. The emperor asked him to calculate the amount of precipitation within a radius of 100 miles, and he estimated that he would have to use a very large piece of paper to complete the calculation before he could write down the data.

"Your Majesty...... Minister...... Minister, minister needs ...... Larger paper calculations. Li Zubai wiped the sweat from his forehead and decided to calculate. This kind of technical person, when he encounters challenges in the field he is familiar with, becomes more and more courageous. He is a persistent person.

"Yes."

After a long time, Li Zubai finally came up with an answer in a trembling voice, but he didn't dare to read it, he raised it above his head tremblingly, and said in a trembling voice: "Your Majesty, this is ...... This, this is really...... Be...... Be...... I...... I, the minister, the minister dare not read it. ”

The ministers of the main hall have been surprised and eaten a basket today, and now they are surprised again, what else is there that they dare not read? All curious.

"Big companion, you go and help Li Aiqing read it."

"Yes, Your Majesty." After Wang Chengen finished answering, he went to help Li Zubai read the answer.

……

Wang Chengen took the paper in his hand, frowned, and was puzzled for a long time before he read aloud: "One hundred and one thousand ......,250 million."

Thundered~! The hall was like a huge thunderbolt. The ministers were shocked by this "astronomical" number!

……

Half a sound, no one spoke, and they all digested and accepted today's thing in their hearts.

How can there be so much water in the sky? If we throw a brick down from the top of the city, we can kill people, which is called defending the city and killing the enemy. There are tens of billions of catties of water in the sky, falling, what is this called? How come we weren't stoned to death? Odd! Fake?

The ministers are wondering!

Yang Gai suddenly said: "So much water is in the sky? Why can't I go to heaven? I want to be the son of heaven, and I also think that one day, I can go to heaven to see it! ”

Burst~~~~~!

In the main hall, all the ministers had the urge to look up to the sky with their blood in their hearts. to alleviate the impact of this sentence on them.

Heaven! What a naïve topic this is.

Serious! Be serious! Don't laugh!

Depressed, uncomfortable, and surprised, today I have eaten a pound again, and some ministers seem to have been thundered by a huge thunder, and their whole bodies are scorched and tender. If you say no, you can't do it.;