Multiply the length of the floor by the width of the floor.
All the way into the corners, measured without the furniture.
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To find the square feet of a room, multiply the length times the width. 12 feet X 12 feet = 144 square feet.
There is no such unit as "cubic square feet". If you want to calculate the cubic feet of volume in a room, multiply the room's length (in feet) by its width (in feet), and then multiply that result by the room's height (in feet).
To find the square footage of a room, you simply multiply the length of the room (in feet) by the width of the room (in feet). The answer is the square footage of the room (assuming the sides opposite each or are equal in length)
There are: 12 feet × 12 feet = 144 square feet
To find the square footage of a rectangular room, you multiply the length by the width. In this case, the room is 34 feet long and 58 feet wide. Therefore, the square footage of the room is 34 feet x 58 feet = 1972 square feet.