I've tried searching the forums and google, but most answers seem too handle more variables than I have. I need the simplest way to find out how many times a small rectangle can fit in a larger rectangle. All of the packing algorithms I found are made for packing rectangles with varying size. I was hoping it would be a lot simpler when the smaller rectangles are always the same dimension.

I.E. How many 2x5 boxes can you fit in a 13x20 box.

It has been a long time since I had any classes or coded any math algorithms. Any help is appreciated.