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4 times with a remainder of 56
81 ÷ 19 = 4 with remainder 5 or 4.2632
11 with remainder 4.
4 can go into 81 twenty whole times. After that, the 81 is still not full, but there is onlyenough room left in it for ' 1 ' more, so it is not possible to jam the entire 4 in again.If you're allowed to cut the 4 up in pieces, then you can use ' 1 ' to fill up the restof the 81, and then unobtrusively discard the 3 that you have left over.
81/7 = 11 4/7