Area is defined as Length times Width 1 Acre (43,560 square feet) is a piece of land whose Length times Width is 43,560. Or if we take the square root of 43,560 we get 208.7 … In other words if a piece of land is 208.7 feet on one side and 208.7 feet on another side this would be 43,560 square feet.nswer by Ablex. Confidence votes 824. There are 43,560 square feet in one acre so take the length times the width in feet and divide by that figure to find the number or fraction of an acre. If the property is irregular, take length times width of each roughly rectangular chunk and add them together before dividing.