The answer depends on the units of measure for 35x35. Clearly a room that is 35 feet * 35 feet will be quite different to that measuring 35 inches x 35 yards!
1225 square feet
35 x 35 = 1225 square feet.
221 square feet
87.75 square inches
A 48ft by 10ft room is 480 square feet
1000 square feet
600 square feet.
300 square feet
140 sq. ft.
120 square ft
And 23 ft x 23 ft room is 529 sq ft.
25 square feet
207 square feet.
235