16 ounces to the pound, 14 pounds to the stone
12 inches to the foot, 3 feet to the yard, 22 yards to the chain, 220 yards to the furlong, 8 furlongs one mile.
12 pennies to the shilling, 20 shillings to the pound.
Back in pre-decimal, and pre-metric, days children learnt their times tables, and needed to know how to use them.

Even Europeans seem to sell eggs by the dozen (easier to pack), but we used to know that if an egg was threepence, then a dozen was three shillings.