None.
A foot is a measure of length or distance in 1-dimensional space while a square foot is a measure of area in 2-dimensional space. The two measure different things and, according to basic principles of dimensional analysis, conversion from one to the other is not valid.
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9,29 m2 = 100 sqft
21,780 sqft
39 yards x 100 yards = 35100 sqft (I do not know what lyds are!)
48 sqft
1820 square feet