What you just have to do is multiply 2 1/2 and 1 1/4, but i can still do it. 2 1/2 is the same as 5/2 , and 1 1/4 is the same as 5/4, so just multiply the top and the bottom and you will get 25/8 whicxh is basically 3 and 1/8
The cube has six faces, and each face is a square with sides of length 5.5, so the area of one of this faces is , adding the six faces, we get the answer: