What do zero Division error mean?

Answer 1

Just simple math. You can't divide by zero, math doesn't like the logic behind it. :)

Answer 2

You tried to divide by zero, which mathematically is not allowed.

Answer 3

Mathematically Zero is an empty number, you can attribute something to an empty number; therefor you want 0 to get a value on one your number which is not fare for Blaise Pascal