a worker is tiling the floor of a rectangular room that is 12 feet by 15 feet. THe tiles are square with side lengths 1 1/3 feet. How many tiles are needed to cover the entire floor?

area of room: 12 x 15 = 180 square feet
 area of 1 tile = 1 1/3 x 1 1/3 = 1.78 square feet
 round to 1.8

180 / 1.8 = 100 tiles are needed