<Tr> <Th> Source </Th> <Td> Bank of Russia </Td> </Tr> <Tr> <Th> Method </Th> <Td> CPI </Td> </Tr> <P> The Russian ruble or rouble (Russian: рубль rublʹ, plural: рубли́ rubli; sign: ₽, руб; code: RUB) is the currency of the Russian Federation, the two partially recognized republics of Abkhazia and South Ossetia and the two unrecognized republics of Donetsk and Luhansk . The ruble is subdivided into 100 kopeks (sometimes written as kopecks or copecks; Russian: копе́йка kopeyka, plural: копе́йки kopeyki). </P> <P> The ruble was the currency of the Russian Empire and of the Soviet Union (as the Soviet ruble). Today, apart from Russia, Belarus and Transnistria use currencies with the same name . The ruble was the world's first decimal currency: it was decimalised in 1704 when the ruble became legally equal to 100 kopeks . </P>

What is the name of the currency of russia