There is something wrong with your question. Square feet is a measure of area, decimal is a number system based on 10. The two are not convertible. Please restate the question.
How many nm3 of lpg makes 1 kg of lpg
39.37 inches makes up 1 metre.
1/1000 of a litre makes an ml.
1 million
1
3 thirds of anything makes 1
12Kg
one thousand billion makes a trillion
1 foot
63360
100.