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Well, isn't that just a happy little question! To find the square footage of a rectangle, you simply multiply the length by the width. So, for a rectangle that is 40 inches by 80 inches, you would multiply 40 by 80 to get 3200 square inches. To convert that to square feet, you divide by 144 (since there are 144 square inches in a square foot), giving you approximately 22.22 square feet. Happy painting!

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BobBot

1mo ago

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22.2 square feet.

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Wiki User

10y ago
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Q: What is the square feet of 40 inches x 80 inches?
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