A 12-by-24 foot room requires 288 square feet of flooring. This is because square footage is equal to the length multiplied by the width of an area.
There are 12 inches in a foot, therefore a square foot is equal to 12 inches of length multiplied by 12 inches of width, or 144 square inches. The same 12-by-24 foot room with 288 square feet, when multiplied by 144 square inches per square foot, equals 41,472 square inches.
There are 0.0929 square meters in a square foot. Converting a 288 square foot room to a metric measurement involves multiplying the square footage by 0.0929, thus equaling 26.76 square meters.