multiply 30 by 40
30X40 = 1,200 square feet
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30 X 40 + 1200 sq/ft
9 square feet = 1 square yard Area of the floor = 12' x 30' = 360 square feet = 40 square yards
40*40 = 1600 square feet
40 square yards = 360 square feet.
40 square meters = 430.56 square feet.