430.55 square feet
The answer depends on the units of measurement used for the numbers in the question: feet, metres, centimetres, miles, etc.
40m² = 430.556 ft2
130
40*40 = 1600 square feet
One foot is equal to 0.3048 metres. Therefore, 40 feet is equal to 40 x 0.3048 = 12.192 metres.
40 square metres = 40/10000 = 0.004 hectares
40 square feet = 4.4 square yards.
40 square yards = 360 square feet.
30 x 40 = 1200 square feet.
40 square meters are 430.556417 square feet.
40 square meters = 430.56 square feet.
40 square feet = ~3.72 m2