There are no feet in an acre or in any part of it, but there are square feet. "Foot" is a unit of length or distance. "Acre" is a unit of area. 1 acre = 43,560 square feet 1/2 acre = 21,780 square feet
This question cannot be answered sensibly. An acre is a measure of area, with dimensions [L2]. A foot is a measure of distance, with dimensions [L]. Basic dimensional analysis teaches that you cannot convert between measures with different dimensions such as these without additional information.
0.22 acres = 9,583.2 square feet An acre is a measure of area and can be shown as an equivalent number of square feet. 1 acre = 4840 sq yards : 1 sq yard = 9 sq feet 1 acre = 4840 x 9 = 43560 square feet. 0.22 acre = 43560 x 0.22 = 9583.2 square feet.