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320 rods = 1 mile
144 square inches = 1 square foot
9 square feet = 1 square yard
272-1/4 square feet = 1 square rod
30-1/4 square yards = 1 square rod
7.92 inches = 1 link, 25 links = 1 rod
100 links = 66 feet = 22 yards = 4 rods = 1 chain
10 chains long by 1 broad, or 10 square chains = 1 acre
1 acre = 160 square rods = 4,840 square yards = 43,560 square feet
30-1/4 square yards = 1 square rod, perch, or pole
40 square rods = 1 rood
4 roods = 1 acre
2.47 acres = 1 hektar
640 acres = 1 square mile = 1 section
36 square miles or 36 sections = 1 township
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