context: The city is located in a river valley surrounded by arid mountains. The height of the city is around 2,030ft (620m) above sea level. The Spring Mountains are located in the west. Some of the landscape is rocky and dusty. In the city, there are many parks, trees and other greenery. Because of the problem of water sources, there is a move to expand xeriscape rather than parks. Another part of the water conservation effort includes scheduled irrigation groups to irrigate housing. According to the United States Census Bureau, the city has an area of ​​<131.3 square miles (340.0 km2), of which 131.2 square miles (339.8km2) are land and 0.1 square miles (0.26km2; 0.04%) are water.
question: How big is Las Vegas?
answers.text: 131.3 square miles