Korea (South) is 894 times larger than Simi Valley, California.
Area: 99,720 km2 World Factbook
Population: 49,039,986 (July 2014) World Factbook
South Korea, officially the Republic of Korea, is a country in East Asia, constituting the southern part of the Korean Peninsula. The name Korea is derived from Goryeo (also spelt Koryo), a dynasty which ruled in the Middle Ages. Wikipedia
Area: 112 km2 calculated
Simi Valley is a city located in the valley of the same name, Simi Valley, in the southeast corner of Ventura County, California, United States. Situated 30 miles from Downtown Los Angeles, Simi Valley is part of the Greater Los Angeles Area. Wikipedia