See the diagram below for these two ways of interpreting division (albeit division without remainder).
Here is another example:
13 can also be grouped by quotition division see above with 3 groups of 4 with remainder 1. This method will yield the same Math results EXCEPT for problems like 12 divided by 5 which is 2 remainder 2. But divide 12 by 2 and we get 6 not 5 remainder 2 b/c the remainder goes in one more time (same goes for divide 21 by 6 is 3 R3 but 21 divided by 3 is exactly 7 not 6 R3.). So be aware that division these days is about interpretation and not computation.