Gambia is 276 times larger than Costa Mesa, California.
Area: 11,295 km2 World Factbook
Population: 1,925,527 (July 2014) World Factbook
The Gambia is a country in West Africa. It is surrounded by Senegal, apart from a short strip of Atlantic coastline at its western end. It is the smallest country on mainland Africa. Wikipedia
Area: 41 km2 calculated
Costa Mesa is a city in Orange County, California. The population was 109,960 at the 2010 United States Census. Wikipedia