The answer depends on the dimensions used for 8 and 14. A room which is 8 ft * 14 feet will have a different area to one that is 8 metres * 14 metres.
400 square feet.
525 square feet.
120 square feet.
252 square feet.
324 square feet.
140 square feet.
352 square feet.
130 square feet.
770 square feet.
240 square feet
300 square feet.
162 square feet.