178.5 square feet (8.5 x 21 = 178.5).
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115.5 square feet.
Answer = 38 feet x 11 feet = 418 sq feet
28.9255 sq. meters (maybe).
To find the square footage of a room, you multiply the length by the width. In this case, the room measures 10 feet by 12 feet, so the square footage would be 10 x 12 = 120 square feet.
A simple rectangular room 20 feet by 18 feet has 360 square feet.