Hi Kelly,

To help you, i'll make the assumption that the side lengths of the small squares are 5 inches long. Well, the area of a square is the side length squared, so if we have 501 of these squares, we can simply multiply the area of one of the small squares by 501.

That is to say if the side length (s) is 5, the area of the square is s^{2}.

If s = 5 ft,

Area of small square = (5ft)^{2}

Area of small square = 25 ft^{2}

Area of the big square = 501 * Area of the small squares

Area of the big square = 501*25 ft^{2}

Area of the big square = 12,525 ft^{2}