+4 0 divided by 0 is an error, however it is because when you are trying to get to figuring out how many zeroes goes into zero it finds an error. Numberphile (check them out) explains it a lot better in this video: https://www.youtube.com/watch?v=BRRolKTlF6Q however if you really, really are being serious and do not understand, the simple explenation is that when you get down to it there is literally no number that, given a ≠ 0, can be divided by zero to get zero. It is confusion and a mathematical oddity.