How would I set this type of problem up?

Question

A homeowner is planning to tile the kitchen floor with tiles that measure 9 inches by 12 inches. The kitchen floor is a rectangle that measures 9 ft by 12 ft, and there are no gaps between the tiles. How many tiles does the homeowner need?

Answer 1

Convert the kitchen dimensions to inches. Then calculate how any tiles

Answer 2

area of tile = 108 square inches

are of floor: convert dimensions to inches first:

9 ft x 12 ft = 108 inches by 144 inches

area of floor = 15552 square inches

area of floor * 1 tiles

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area of tile

15552 * 1 = 144

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108