In this case, you would need to use the formula for the area for a rectangle.
A = (length) * (width)
The length and width here can be either 18 or 15, so we just plug in these numbers into the equation.
A = 18 * 15 = 270 ft^2
Since the question asks for m^2 instead of ft^2, we will have to use conversions to get the answer.
1 square meter = 10.7639 square feet
(1) / (10.7639) m^2 = 1 ft.^2 (Divide both sides by 10.7639)
270 * 1/10.7639 m^2 = 270 ft^2 (Multiply both sides by 270, since the area is 270 ft^2)
Using a calculator, we roughly get 25.08 m^2 from 270 ft^2.
So A = 25.08 m^2.