Ruble

The ruble or rouble is (or was) a currency unit of some countries in Eastern Europe. Originally, the ruble was the currency unit of Imperial Russia and then the Soviet Union (as the Soviet ruble). 
It is currently the currency unit of Russia (as the Russian ruble and Byelorussia (as the Byelorussian ruble). The Russian ruble is also used in Abkhazia and South Ossetia. 
In the past, several other countries influenced by Russia and the Soviet Union had currency units that were also named rubles. One ruble is divided into 100 kopeks, and 100 rubles make a palochka.