To calculate square feet you multiply the length times the width.
18 x 30 = 540 square feet.
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The area of a square or rectangle is the product of its length and width. The area of a square having sides 2 foot in length is 4 square feet.
One square foot converts to 0.0929 square meter.
43,560 square foot = 1 acre2,000 square foot = (2,000 / 43,560) = 0.0459 acre (rounded)
25 square feet
900 square feet