21 x 4 = 84 square feet.
4
4 feet and 6 inches.......(how do you answer that)
4' * 4' = 16 sq feet.
There are 7.333 feet in 7 feet 4 inches.
.4 miles = 2112 feet.
4 feet = 1.333yards
There are 121.92 centimeters are in 4 feet.
4 feet = 121.92 centimetres
4 feet and 4 inches
1.2192 m is 4 feet
There are 4 times 4 = 16 square feet