"Elok, it shouldn't be difficult for you to calculate the data of the planet under your feet now, right?" Lynn looked at several wizard apprentices and asked with a smile.

Elok and the others nodded excitedly, only then did they understand that when the professor took the first class, the words he said were not bragging, and the Olympiad could really calculate anything!

Once you know what the circumference of the planet is, it's easy to figure out the radius, area, or even volume.

The wizards in the seminar also couldn't contain their excitement, and now there were only ten days left until mid-July......

That is, ten days later, the continent under your feet ...... No, it should be said that the whole picture of the planet will be displayed in front of them.

"I really don't know how your head grows to be able to think of such a strange method!" Raphael said with emotion.

Before Lynn's arrival, although there was no systematic Olympiad in the Wizarding Land, most wizards still knew the operation method of basic geometric figures, but they never thought that they could calculate the circumference of the planet under their feet with such a simple calculation method.

I'm afraid this is genius......

In the face of everyone's praise, Lynn was very calm, after all, this method was not thought up by himself, it was the idea of the former [Father of Geography] Eratosthenes, but some changes were made based on the situation in the Wizarding Lands.

In his previous life, when he was looking for historical materials, Lynn was also amazed by the other party's genius thinking, which was simply a basic method to solve the most complex problems!

"Are there any requirements for where this column will be placed?" Haroff couldn't wait to test that hypothesis, and if it weren't for the fact that there were still ten days left until mid-July, he would have been eager to do it now.

"The ground is as straight as possible, at least 500 kilometers away from Greenriel, and for the data to be more accurate, it is best to be more than 1,000 kilometers!" Lynn said with a deep groan. "After all, the continent under our feet is too big, maybe a scale is tens or hundreds of kilometers, it is better to be as far away as possible, and the column should be as high as possible, so that the shadow is obvious enough."

So far...... Harrov's brow furrowed.

In this way, I am afraid that it will not be possible to verify it in the wizarding lands.

"There is a suitable place, I heard that outside of the mist, there is also a tower hundreds of meters high, which is a ready-made column." Ogst suddenly proposed.

The wizards present were a little surprised, guessing what Ogst was talking about.

Philip on the side suddenly seemed to think of something, and suddenly said in shock. "Master Ogest, you can't be talking about the Heavenly Dome Tower in the Holy City, right?"

Although he had never been to the Sekas Empire, he had heard from Heran Ram and the sailors who had traveled back and forth about some of the novelties of the Misty Sea, including the Tower of the Sky Dome.

It is rumored that it is the manifestation of Ella, the creator of life, the lord of the stars, and the goddess of the moon, and the holy place in the hearts of all believers.

Philip naturally scoffed at this so-called god, but he also knew that the Holy See had power, if they went to the Holy City to measure the length of the shadow of the Sky Dome Tower, it could no longer be described as death, but they were afraid that if they couldn't even enter the gate, they would be arrested and burned to death.

However, there are not many sane people like Philip, and many young wizards are even clamoring to go directly to the Holy City.

In their eyes, the land of wizards today is no longer the refuge of the exiled wizards in the past.

After hundreds of years of development, they have created countless novel magic, established a wizard promotion system and a magic theory system, and are powerful beyond imagination!

The picture of the stars that Lynn told them made the wizards realize that the world was so big, and they were trapped in this small wizarding land......

But Harrov soon poured cold water on him. "We only have ten days, and even if we set off now, we may not be able to reach the Sky Dome Tower as fast as possible."

"And there's no need to make it so troublesome, we can make a floating Iceland directly on the sea with magic, and set up an icicle on it, so that the calculation is the most accurate!"

The side of the Wizarding Lands facing the Secas Empire is the Sea of Mist, but this does not mean that the entire island is covered in mist, in fact, the sea area behind is passable.

It's just that this sea is too wide, and once a great wizard wanted to see what was on the other side of the sea, but after flying for a month, he only found some uninhabited islands and vicious sea beasts, and he almost couldn't find the direction to come back.

Under Harrov's decision, public opinion did not evolve to the point of entering the Sekas Empire and overthrowing the Holy See.

Although Harrov's floating island plan was seen by some wizards as "cowardly" by the Holy See, they did not dare to speak out against it, and the focus of discussion soon turned to how to determine the distance between the corona tower and the column.

One of the witches quickly suggested that they could find a very long rope, measure the length, use it as a unit of length, and then leave a mark on the ground for each distance they crossed, and finally count how many marks there were.

But it didn't take long for this proposal to be rejected, because it was too troublesome, not to mention the undulating terrain of the Wizarding Lands, which would have a big error.

After a heated discussion, the more convenient horse-drawn carriage and ship ranging method soon prevailed.

"How about an airship?" Lydia raised her hand and proposed.

Raphael and the others suddenly felt that their eyes lit up, he wanted to say this just now, but Lydia mentioned it first.

Compared to the alchemy ship, which can be disturbed by wind and waves, the airship suspended in the air is undoubtedly a better choice.

Not only can it overcome all obstacles and achieve a real straight line, but after blessing the wind magic, the speed of the sailing is also very stable, and it is not easy to fluctuate.

If the airship can travel 15 kilometers per hour at full speed, then it will be 360 kilometers a day at full speed, and it is still very accurate to judge the distance based on this......

Lynn didn't participate in the discussion, turned to look at the wizards of the Prophecy School, and asked with a smile. "Mr. Yoland, do you have any questions now?"

Yolande was stunned and didn't reply, his mind was full of Lynn's method of dividing the circumference into equal circles.

Although he had not yet come up with an accurate result, he understood that the School of Prophecy had lost this time, and it had lost completely!