ok first you need to ask your self how many times does 8 go in to 20 ? 2 times now you need to put that 2 on top of the 1 then go 2 times 8 is =16 wright the 16 under the 2 and the 1 of the number 216 then you need to subtract 21- 16 =5 then put that 5 under the 6 of 16 then bring down that last 6 now ask your self how many times does 8 go in to 56? 7 times now put that 7 on top of the 6 now go 7 times 8 = 56 right that below the 56 now subtract your 56 and 56 =0