It's in the name, pizza was just invented to be delicious based on mathematical formulas. It makes so much sense now.
If you confuse with what I'm trying to say, a cylinder with radius r units and height h units has a volume of V cubic units given by V = π x 2r x h. So, the mathematical volume of a pizza is pizza, if you change r with z and h with a. If you still not get it, please find back your primary school mathematic text book.
Source from Neatorama