Multiply the length [in feet] times the width [in feet] and then the answer would be the total square footage.
Area of rectangle = length x width = 25 x 12.5 = 312.5 square feet
To find the area in square feet of a rectangle measuring 60 feet by 80 feet, you multiply the length by the width: 60 x 80 = 4,800 square feet. Therefore, the area of the rectangle is 4,800 square feet.
If the dimensions of the rectangle are in feet, the perimeter will be in feet as well. The area will be in square feet. The area is length x width. The perimeter is 2 x (length + width) or 2 x length + 2 x width.
Making the assumption that the room is rectangular (as most are) then this question is the same as "what is the area of a rectangle 16x9 feet?" To find the area of a rectangle you multiply its length by its width, so we do: 16x9 =144 square feet or 16 square yards.
To find the area in square feet for a 3'x6' rectangle, multiply the length by the width: 3 feet x 6 feet = 18 square feet. Therefore, a 3'x6' area is 18 square feet.