Europe is 25 times larger than California (USA).
Area: 403,466 km2 US Census
Population: 38,332,521 (July 2013) US Census
California is a state located on the West Coast of the United States. It is the most populous U.S. state, home to one out of eight Americans, and is the third largest state by area. Wikipedia
Area: 10,180,000 km2 DESA
Population: 738,199,000 (2012) DESA
Europe is, by convention, one of the world's seven continents. Wikipedia