How did he do it!

Idk! Lol

oh shoot-

Allow me, division is how many times me number goes into another one. Thus, zero goes into zero 1 time.

Equaling one

Let's see if you divide a whole of a cake with a non-existent knife then you get one whole cake
boom
oh and Cookie Monster
just try to imagine that with cookies

I have the solution to 0 / 0, it’s every number, because any number multiplied by zero is zero