First you would add 27 and 9 to find the total number of games he sold, next you would divide 900 by 36 to get 25, then you would do 25 times 36 to check your answer.
So Thw Problem Says 233 Feet of Wood To Build a Fence and Wood Comes in Length of 11 so Look for the Key Word. The Key Word is Total And than Means Divison. So you have to Divide 233 And 11.