Using todays modern math (everyone is a winner, no loosers....all answers are correct) I submit this manipulation of numbers for my submittion...
Given M16 and M4
Using the M
Using the 6 from M16 and the 4 from M4
6-4=2
Now we have M2
Using the 4 from M4 we have M24
6 in the M16 plus 4...