There are 43,560 square feet in an acre. The calculation shows that it would be .327 acres.
The answer depends on the units of measurement used for the numbers in the question: feet, metres, centimetres, miles, etc.
1.18 acres = 51,400.8 sq feet.
3.09917 acres.
20.89 acres.
How many acres are 310 feet * 630 feet
108,000 square feet or 2.479 acres.
About 0.17 acres.
5.36 acres.
0.505 acres.
2.75 acres.
2.083 acres.