What is the currency of Iran?

Rial is the official currency of Iran and the figures of coins and bills minted by the government are expressed in rial. Due to the inflation and uselessness of zero in rial, Iranians normally use another currency, toman, which is equivalent to ten rials. The use of toman, not officially recognized, makes momentary calculations easier, despite the fact that the prices are written in rial. For instance: if a piece of bread costs 30000 rials, the baker tells the customers 3000 tomans.