Multiply the two dimensions to get the area. The calculation gives you 507 square feet.
117 square feet.
91 square feet (13 x 7 = 91).
400 square feet.
It depends on the units for 13 and 7: 13 metres by 7 metres? yards?
525 square feet.
120 square feet.
252 square feet.
324 square feet.
140 square feet.
352 square feet.
130 square feet.
770 square feet.
240 square feet
300 square feet.