You feel a bit of the effect when you go to a country which uses different metric units. For instance in Sweden you commonly have hekto (= hectogram = 100 g) an

You feel a bit of the effect when you go to a country which uses different metric units. For instance in Sweden you commonly have hekto (= hectogram = 100 g) and mil (= 10 km). Or Germany where Pfund is still common (500 g). It will make you need to think a bit at first.