234 square feet (18 x 13 = 234)/
1 acre = 43,560 square feet 13 acres = 566,280 square feet
The answer will depend on 24 WHAT!
The answer depends on the units used fopr 23 and 13. It should be obvious to anybody tha the square footage of 23 feet by 13 feet will be quite different to that for 23 metres by 13 metres (or any other units of length)!
13'x13' = 169 square feet
If mean how many square feet are in 13 feet by 25 feet, then the answer is 325 square feet. (13 x 25 = 325)
13' x 13' (169 square feet) = 18.77 square yards. (divide square feet by 9 to get square yards)
Its 169 square feet.
if you mean 13 feetx13 feet, then answer is 169 square feet
12 x 13 = 156 square feet.
13' x 17' = 221 square feet.
13 x 16 = 208 square feet.
13 x 20 = 260 square feet.
It is 132 or 169 square feet.
Multiply 13 x 13, that comes to 169 square feet.
13 x 18 = 234 square feet.
13 acres is 566,280 square feet.