5260 x 5260 x 18 [ square feet ]
18 miles * 13 miles = 6,523,545,600 sq feet. (You did mean miles, didn't you?)
1.8 miles * 18 ft = 1.8*5280 ft * 18 ft = 171072 sq ft
18 x 18 = 324 square feet
18 square meters is the same as 193.75 square feet.
18 x 18 feet = 324 square feet 18 x 18 inches = 2.25 square feet
There are: 8 times 18 = 144 square feet
18 square feet = 1.67 square meters.
18 square feet is about 1.7 (1.67225) square meters.
There are 144 18 square inch tiles in an area of 18 square feet.
2.25 square feet.
There are: 18*15.5 = 279 square feet
10' x 18' = 180 square feet.