computers can’t multiply. they add or substract e.g. let us divide 10/3 by using substraction. we’ll deduce 3 from 10 on and on
10/3 is 3 1/3
count step
10
7 +1
4 +1
1 +1
where 1 is the remainder
3 steps with remainder 1
same for multiplication
mechanical computers were based on this principle as well as modern ones