66 x 660 = 43560 sq. ft.
One acre-foot is about 325,851 US gallons.
One acre-foot is 1,233.5 cubic meters.
An acre is a unit of area. A foot is a unit of distance. The two units are therefore incompatible.
One acre-foot is 325,851.4 US gallons of water.
1 acre-foot is 325,851.43 US gallons.
43560 square feet in one acre.
1 square foot = 0.000022957 acre (rounded) 1 acre = 43,560 square feet
1 acre-foot = (325,851/number of gallons in each barrel) barrels
784,080
0.7 acre = 30 492 square foot
An acre (or a tenth of an acre) is a measure of area while the foot is a measure of distance. They cannot be compared in this way.
There are 43,560 square feet in an acre. This becomes .0229 of an acre.