Understanding Modulo (remainder of division)

If you have {{l}} coins,
and want to buy items that cost {{r}} coins each,
you could only buy {{wholes}} item s ,
meaning you would only spend {{wholes*r}} coins ({{wholes}}x{{r}}),
and still have {{m}} coin s 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}} item s ,
but then you would have {{m}} coins left

If you prefere, you could also think of it as fractions: