Mongolia is 61,901,061 times larger than Russell Square.
Area: 1,564,116 km2 World Factbook
Population: 2,953,190 (July 2014) World Factbook
Mongolia is a landlocked country in east-central Asia. It is bordered by Russia to the north and China to the south, east and west. Ulaanbaatar, the capital and also the largest city, is home to about 45% of the population. Mongolia's political system is a parliamentary republic. Wikipedia
Area: 0 km2 calculated
Russell Square is a large garden square in Bloomsbury, in the London Borough of Camden. It is near the University of London's main buildings and the British Museum. To the north is Woburn Place and to the south-east is Southampton Row. Russell Square tube station is nearby to the north-east. Wikipedia