81 ÷ 28 = 2 with remainder 25.
2
40 with 1 remaining 81 - 1 = 80 = 2 x 40
27 and 3 can go into 81. 81, and 1 can also go into 81.
40 with remainder 1.
Two goes into eighty-one 40.5 times.
Twice with remainder of twenty five
two with five remaining 38 + 38 = 76 = 81 - 5
Once with nine as a remainder.
81 and 78 go into 2106.
It could go in aproximately 3 times.
It is: 9^2 = 81