Another way to think about it, is that something that is divisible by both 9 and 4 is going to be divisible by 12.

One way to figure out if a number is divisible by 9 is to actually add up the digits and see if the digits are divisible by 9.

So, fairness to one and to the other is not divisible.

And then finally, we need it to be divisible by 15's prime factors.

We can actually simplify it because 9, 3, and minus 18 are all divisible by 3.

And there is many ways to do it, you could just pick one of these numbers, and take all of its multiples until you find a multiple that is divisible by all of the rest.

The indentation width is the number of spaces which is used to indent a line. If the option Insert spaces instead of tabulators in the section Editing is disabled, a Tab character is inserted if the indentation is divisible by the tab width.