You give each one 33 1/3 acres. Just it's easy to make 1/3 mile by breaking it down to 1760 feet, it's easy to make 1/3 acre by breaking 660ft x 66ft down to 2

You give each one 33 1/3 acres. Just it's easy to make 1/3 mile by breaking it down to 1760 feet, it's easy to make 1/3 acre by breaking 660ft x 66ft down to 220ft x 66ft ([EDIT] or 660ft x 22ft, if you want to keep it 1 furrow long for easier plowing). And if you needed to, you could break one of the feet down into 1/3 foot (4 inches). That's a key factor in all these "archaic" measurement systems.