The tiles that fit

Problem

You're covering a wall tall by wide centimeters with square tiles of side centimeters. They go up in even rows and you can't cut them: the strip left over at the edge stays bare.

Write a function that returns how many whole tiles fit.

On a wall 10 by 9 with tiles of 4, four tiles fit: two rows of two.

If the tile is bigger than the wall, none fits and you return 0.

Examples

• An exact wall

  10, 8, 2 → 20

• Leftovers on both edges

  10, 9, 4 → 4

• The tile doesn't fit

  5, 3, 6 → 0

Besides these, the challenge has hidden tests that are revealed when you submit your solution.

You start with this

def tiles(tall, wide, side):
    pass

function tiles(tall, wide, side) {
}