In an office measuring 13 units by 9 units, there are 117 square units. This is defined as the area of the office in square units.
The formula for finding the area of a figure is length x width = area. If an office measures 13 units by 9 units, then the office is 13 units long and 9 units wide. The area is 13 x 9 = 117 square units, or 117 units squared. Area is measured in square units because two measurements of the same unit are being multiplied together. If the units in the office are feet, the area is 117 square feet.