The answer depends on the room.
The answer is 63 square feet. Multiply the length by the width.
To find the square footage of a room, you simply multiply the length of the room (in feet) by the width of the room (in feet). The answer is the square footage of the room (assuming the sides opposite each or are equal in length)
198 square feet. Just multiply length by width - the answer is the square footage.
204 square feet. Just multiply length by width - the answer is the square footage.
19.2 square feet. Just multiply length by width - the answer is the square footage.
144 square feet. Just multiply length by width - the answer is the square footage.
49 square feet. Multiply length by width - the result is the area in square feet.
135 square feet. Just multiply length by width - the answer is the square footage.
You do not specify the units for '34' nor '58'. Hence you cannot calculate 'square feet'. Are the units, 'inches', feet' , 'yards' etc., Assuming the units to be 'feet(ft)'. Then 34ft X 58ft = 1972 sq.ft. Note the use of the units.
If the room is rectangular, the area is simply length x width. If length and width are in feet, then the result of the multiplication will be square feet.
Area is length times width. The floor is 100 square feet.
You multiply the width by the length, thus: 8 feet *12 feet = 96 square feet.