84 - 6 = 78, 78 - 6 = 72, 72 - 6 = 66, 66 - 6 = 60, 60 - 6 = 54, 54 - 6 = 48, 48 - 6 = 42, 42 - 6 = 36, 36 - 6 = 30, 30 - 6 = 24, 24 - 6 = 18, 18 - 6 = 12, 12 - 6 = 6, 6 - 6 = 0. Then you see how many times you did - 6. which is 14.
Hope this helps :)
