how do you divide by zero?

u will get an error

You can't. Why? -   the division sign is a question.As below :

10/2  means 'what number must I multiply 2 by to get 10?'   answer 5.

10/0  means 'what number must I multiply 0 by to get 10 ?'   No such number.  Mathematicians say that division by zero is not defined.

you cant