"Fully memorize all the digits of Pi." the green-skinned frog croaked.
"Ah," Fang Ning startled and immediately reacted. "that's something no one can do."
"Why?" the green-skinned frog was confused, and then said disdainfully, "Is it because you can't do it that you said so?"
"No, it's because Pi has an infinite amount of numbers. No one can completely recite it, much less memorize it…" Fang Ning explained.
The green-skinned frog was shocked, but it said in disbelief, "It's not infinite just because you say it's infinite. You'll have to prove it to me. This question was given by that guy."
Fang Ning hurriedly told the people in the Penitentiary to find out the calculation formula for him. After all, he only remembered the ratio was between 3.1415926 and 3.1415927, and forgotten all other relevant information. He only remembered that the textbook did not give any specific derivation process.