9 sq ft = 1 sq yard
so 28 ft * 18 ft = 28*18 sq ft = 56*9 sq ft = 56 sq yards.
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6^2 yards.* * * * *NO!9 square feet = 1 square yard so 18 square feet = 2 sq yards.
square feet and yards measure different things you can't change from one to the other. Square feet measure area and yards/feet measure length/distance.
28 * 18 / 9 = 56 square yards.
18 feet is 6 yards, and 21 feet is 7 yards. 6 multiplied by 7 is 42. Therefore, it's 42 square yards.
9 square feet = 1 square yard 18 square feet = 2 square yards 27 square feet = 3 square yards . . . 655 square feet = 727/9 square yards