Maria and Cassie were playing checkers when Cassie suggested, "Let's count all the squares on the checkerboard."
Maria answered, "That is very hard."
Cassie said, "But all we have to do is multiply 8 X 8."
"Oh no, Cassie. There are many more and lots of different sizes," Maria responded.
Help Cassie and Maria count all the squares on the checkerboard.