There are 3 feet in a yard, and no such word as feets. 3 times 7 is 21 ft in 7 yards.
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5.15 feets
three feets
1 yard are 3 feets
10x10=100 ft
157 centimeters is 5.15 feet.
50 feet (not feets) equal 15.24 metres (not maters).
3
2186 square feets = how many 10 x10 booths
186 centimetres make 6.102 feet. (1 foot, many feet: feets has no meaning)
none
2,112