Russia is 221 times larger than Serbia.
Area: 17,098,242 km2 World Factbook
Population: 142,470,272 (July 2014) World Factbook
Russia or, also officially known as the Russian Federation, is a country situated in northern Eurasia. It is a federal semi-presidential republic. Wikipedia
Area: 77,474 km2 World Factbook
Population: 7,209,764 (July 2014) World Factbook
Serbia, officially the Republic of Serbia, is a country located at the crossroads of Central and Southeast Europe, covering the southern part of the Pannonian Plain and the central Balkans. Wikipedia