A library wants to add a rectangular window made of small glass squares. The window space is 9 feet long and 6 feet wide. Each small glass square has sides that are 1 foot long.
How many small glass squares are needed to make the window?
To find out how many small glass squares are needed to make the window, we need to calculate the total area of the window in square feet and then divide it by the area of each small glass square.
The area of the window is 9 feet * 6 feet = 54 square feet.
The area of each small glass square is 1 foot * 1 foot = 1 square foot.
Therefore, the number of small glass squares needed to make the window is 54 square feet / 1 square foot = <<54/1=54>>54 small glass squares. Answer: \boxed{54}.