120
30
The answer depends on how big each square is.
264ft² = 24.5m²
6.096 meters
3.6576
3.048 metres.
13.94 square meters.
12ft² = 1.1148m²
20.4 m2
10 feet = 3.048 metres.
Actually you really need to know height of the area, too since you are trying to heat or cool xxx number of cubic feet. the difference between an 8ft, 10ft, 12ft or higher ceiling will make a BIG difference.