The answer depends on the units used for 4x8 which are unspecified. The answer will vary according to whether those units are inches, metres, parsecs, etc.
The area is 13.5 feet times 23 feet = 310.5 square feet.
Length times width will give you area. So this comes out to 81 square feet.
There are [ (150) times (the area of each square in square feet) ] square feet.
There are: 3 times 3 = 9 square feet
The area of 12 foot times 20 foot are 240 square feet.
In total it is 117 square feet because you are measuring area and for area it is length times width so 13 times 9 equals 117 square feet
Length times width will give you area. So this comes out to 320 square feet.
96 square feet. Multiply length by width - the result is the area in square feet.
63 square feet. To get area, multiply length times width.
Length times width will give you area. So this comes out to 400 square feet.
1,920 square feet. Multiply length by width - the result is the area in square feet.
That would be 196 square feet. If you are measuring a square or rectangle area, you can multiply length times width; Length x Width = Area.