How many square inches are in 60 square feet?

Step 1 ：First, we need to know the conversion factor between square feet and square inches. There are 12 inches in a foot, so there are \(12 \times 12 = 144\) square inches in a square foot.

Step 2 ：Therefore, to convert square feet to square inches, we need to multiply the number of square feet by 144.

Step 3 ：\(60 \times 144 = 8640\)

Step 4 ：\(\boxed{8640}\) is the final answer. There are 8640 square inches in 60 square feet.