/sci/ - Science & Math

I can't brain today, too much gluten.

How do I calculate the amount of squares that can be attached to a line without overlapping?
The length of the line divided by the length of the square of course, right?

But how do I calculate it where the squares skip its length before repeated?
Like, a 3cm long line will allow three 1cm cubes to run along it, how many will run along it if they skip one every 1cm, obviously 2, but how do I mathematically calculate it so I can just punch it into a calculator?

At first I thought it was (l/s)-(l/(l/s)) but that's wrong, then I thought if you squared s, but that makes no sense. Please help.