It is exactly 400 square feet.
Chat with our AI personalities
A measurement of 400 square feet is an area which is measured by multiplying the width by the length to reach a total of 400. An area 10 feet by 40 feet would be equal to a total of 400 square feet.
The area of rectangle is : 400.0
None ... gallons is a measurement of volume, square feet is area not volume.
400 square feet
A room 20 feet by 20 feet will have a floor that size.