-- 625 on the floor
-- 625 more on the ceiling
-- many more on the walls; in order to calculate them, we
need to know the height of the ceiling above the floor.
Add:
Assuming you mean 25ft x 25ft, square feet (area) equals length x width. So, the area = 25ft x 25ft = 625 ft2.
625 square feet. Just multiply length by width - the answer is the square footage.
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.