Bhutan is 244,148 times larger than University Botanical Garden (Oslo).
Area: 38,394 km2 World Factbook
Population: 733,643 (July 2014) World Factbook
Bhutan, officially the Kingdom of Bhutan, is a landlocked country in South Asia located at the eastern end of the Himalayas. It is bordered to the north by China and to the south, east and west by India. Wikipedia
Area: 0 km2 calculated
The University Botanical Garden at Tøyen in Oslo is Norway's oldest botanical garden, established in 1814. It is administrated by the University of Oslo. The University of Oslo's oldest building, the Tøyen Manor which was given as a gift in 1812, is located in the garden. Wikipedia