Simply put, Divide by zero is actually infinity. Although, mathmatically it cannot be solved (leading to calculators giving Div-by-zero error)

You're about to get a crash-course in limits.

Mentally, This can be thought of as taking any number and dividing it by smaller and smaller numbers. The smaller the divide-by number is, the more MASSIVE the answer. If you divide by the smallest number possible (Ten, divided by 0.00(...)01 with nearly infinite zeros, but still 1 at the end, you'll get a nearly Infinite number). basically infinite

10/5 = 2
10/2 = 5
10/1 = 10
10/0.1 = 100
10/0.001= 10000
10/0.00000001 = 100000000
so, continue this:
10 / 0.0000000000000000000(infinity zeros)0001 = MASSIVE 10000(infinity zero)000 number = basically infinity.