How to calculate the square meters? Length: 3.53 meters, width: 3.25 meters, height: 2.74 meters. How many square meters does this room need to be calculated? Thank you

How to calculate the square meters? Length: 3.53 meters, width: 3.25 meters, height: 2.74 meters. How many square meters does this room need to be calculated? Thank you

How many square meters of a room is the floor area, not the volume, which has nothing to do with the height
Room area: 3.53x3.25 = 11.4725m2
This room is 11.4725 square meters