If you have {{l}} coins,
and want to buy items that cost {{r}} coins each,
you could only buy {{wholes}} items,
meaning you would only spend {{wholes*r}} coins ({{wholes}}x{{r}}),
and still have {{m}} coins left, the remainder ({{l}}-{{wholes*r}}).
If you have {{l}} coins,
and want to buy items that cost {{r}} coins each,
you could buy exactly {{wholes}} items,
but then you would have {{m}} coins left
If you prefere, you could also think of it as fractions: