28x12 equals 336
To calculate the square footage of a room that measures 28 feet by 12 feet, multiply the length by the width: 28 ft × 12 ft = 336 sq. ft. Therefore, the room is 336 square feet in size.
By unit of length and distance and conversion ,we can say that 1 feet=12 inches 28 feet =28X12 =336 inches