Always carry a small calculator when you travel internationally. It will save the day when you are trying to figure out how much things cost in “real” money.
Moreover, since math is universal, it will cut across language barriers when haggling in markets — just type in what you want to pay, pass it to the seller, and let him enter his counter offer.
You’ll avoid struggling with the right word for the number, and you won’t end up paying cinquenta dolares ($50) instead of cinco dolares ($5) for that sombrero for Uncle George.
[Photo: Flickr | ken2754@Yokohama]