If the metric system did ever take over, we'd have to change our thinking to the following:
A miss is as good as 1.6 kilometers.
Put your best 0.3 of a meter forward.
Spare the 5.03 meters and spoil the child.
Twenty-eight grams of prevention is worth 453 grams of cure.
Give a man 2.5 centimeters and he'll take 1.06 kilometers.
Peter Piper picked 8.8 liters of pickled peppers.