The sun slowly rose above everyone's heads, and the sun scorched the earth, and although it was early spring, due to the low dimension of the Dream Sword Kingdom, everyone still felt the scorching power from it.

Everyone was looking at Emiya in the field, not understanding what he was going to do.

It was at this moment that Liu Dun's voice sounded in the Qiankun mirror, "It's time." ”

Emiya nodded, then fixed his gaze on the shadow cast by the tower on the ground—

2.526588, m.

His brain read the instantaneous value, but was still pretending to measure it with a tape measure.

People saw that Wei Gong had words in his mouth, and they didn't understand what he was saying.

After a while, Emiya stood up, and his long robe draped in blue ribbon was lifted by the sea breeze, revealing a sturdy figure inside.

His brain was racing, and after a while, he scanned everyone with a pair of piercing eyes like the sun and the moon, and then announced in a solemn tone, "The circumference of the world we are in is about 38,916.1248 kilometers. ”

As soon as he said this, there was an uproar around him.

"Oh my God, what was he talking about?"

"It's like saying that our world is less than 40,000 kilometers in circumference."

"Really? Are we in such a small world? ”

"How is this possible, he must be talking nonsense, labor and management have to run more than 10,000 kilometers a year, does it mean that I can reach the end of the world in only 4 years?"

“…… According to what Master Emiya said just now, it seems to be like this......"

Everyone was confused, and they didn't understand how he came up with this number.

In particular, the arithmetic scholars led by Du Zheyi could not be calm at all.

"Master Du, is what this little fart said just now true?" One of the old men, who was about the same age as Du Zheyi, asked.

Their eyes focused on Du Zheyi's body.

Du Zhe was stunned for a moment, and didn't say a word, the result that Wei Gong said just now was about 20% different from the data calculation results of his previous eradication of other people's navigation records, and he was not sure at all whether the extra 20% error was caused by a curved route.

If what Wei Gong said was 400,000 kilometers, or 10,000 kilometers, then he could bluntly assert that Wei Gong was wrong, but this value was no more and no less, and it was within the margin of error of his psychological expectations.

"Everyone, please be quiet." Du Zheyi stood in place and shouted loudly.

Under the maintenance of his apprentice and Kenrin Sakura, the field gradually quieted down.

"This ...... Swordsmith. Du Zheyi stood in place, looked into Wei Gong's eyes and asked, "I am an arithmetic from the Heavenly Sword Kingdom, and I have been studying the world-sized puzzles left by Yue Chuanwo for a long time, so I can be regarded as having a little right to speak. When you say this, we can't believe the results you say, little master, can you explain the whole derivation process and principle? ”

Arithmetician?

Wei Gong looked at Du Zheyi, a little suspicious of his age, but he still bowed to him politely, and then asked someone to find a blackboard and come back.

"That's right." He picked up the chalk and drew a big circle on the blackboard, "According to the clues left by Yue Chuanwo, we all know that the world we are in is a circle, and everyone has no doubts about this, right?" ”

Du Zheyi and the others nodded, the corners of their mouths twitched, does this little bastard treat us as three-year-old children?

Emiya drew a few parallel lines on the blackboard as sunlight shining on this circle, and drew a line segment on the circle to represent the Zhengyuan Tower, and began to explain seriously, "The distance between Muliang and here is about 800 kilometers, if the sunlight is calculated as if it is parallel light, the length of the shadow is measured, and the illumination angle at this time can be obtained by calculating the height of the tower and the tangent value of the shadow. Then the angle of the top angle of the triangle formed by the height of the sunlight and the shadow and the hypotenuse is similar to the central angle of the fan-shaped circle formed between the two places, and the distance between the two places can be compared to calculate the radius length of the world sphere in which we are located.

The result I calculated just now is that the shadow of the tower on the ground is 2.526588 meters, and when divided by the tower, the tangent value obtained is 0.126329378, so the corresponding angle between the sunlight and the tower is about 7.2 degrees. From the center of Muliang to here, the distance is about 778.322496 kilometers, you can see this as the arc length corresponding to the 7.2 degree central angle, so that according to the calculation, the circumference of the world ball is about 38916.1248 kilometers.

Although this value is also an approximate value, from a macro point of view, the range of deviation is not large. ”

After Wei Gong finished speaking, the entire calculation process had been written on the blackboard according to what he had just said, and he dropped the chalk and looked back at everyone indifferently.

"How? Do you understand? ”

Although Wei Gong didn't mean to humiliate these arithmeticians, his tone was extremely arrogant to everyone's ears.

However, except for these arithmeticians, no one else in the field had a good education in mathematics, and listening to him say this was like listening to a book from heaven.

Everyone turned their heads to look at Du Zheyi.

If there is anyone in this world who can distinguish the truth of what Wei Gong said, this person is probably only Du Zheyi, if even he can't understand what Wei Gong is saying, I'm afraid that no one in this world can understand it.

Du Zheyi took out a handkerchief from his arms and wiped the sweat from his forehead, he had never been so nervous.

Even ten minutes ago, he was confident that he could expose Emiya's lies.

But when he saw the formulas and calculations he wrote on the blackboard, he couldn't help but be a little scared.

His instincts told him that the teenager was right.

Du Zheyi clenched the dragon head cane in his hand with a trembling hand, and then walked to the blackboard tremblingly.

At the same time, some of his protégés and colleagues stepped forward to follow him to understand and check the results of the calculations.

Silence returned to the field, and everyone did not dare to come out, looking at them intently.

Although Jian Rin Sakura still had a smile on her face, she also sweated in the palm of her hand for Emiya.

Today's measurement is really a bit risky, and if it is not done well, it may really bring negative effects to the Dream Sword Country.

After a while, the arithmeticians led by Du Zheyi turned around with trembling bodies and looked at Wei Gong with an incredulous and awe-filled expression.

Du Zhe was stunned for a moment, then threw away the crutches in his hand and fell to the ground in front of Wei Gongbai.

"Master Weigong, your calculation is correct, it is simply the great god Yue Chuanwo is alive!"

Everyone was stunned by this scene, this young swordsmith was actually recognized by the master of the world's arithmetic world, and actually put him at the same level as Yue Chuanwo.

……