28 square feet. This is an easy calculation - just multiply the length by the width. The answer is the number of square feet.
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4 by 7 feet is 28 square feet.
There are 47.52'7' repeating '7' square feet
7 * 10 = 70 square feet.
7 feet x 10 feet = 70 square feet
12 x 7 is 84 square feet