how do you calculate the wing area with the following information?

1. weight of an airplane is 4.5 g and a wing area is 159.35 cm square this equals to a wing load of .0282 g/cm square. How is 159.35 the wing area?

2. weight of an airplane is 4.5 g and a wing area is 197.3 cm square this equals to a wing load of .0228 g/cm square. How is 197.3 the wing area?