Las Vegas is 3.8 times larger than Lansing, Michigan.
Area: 96 km2 calculated
Lansing is the capital city of the U.S. state of Michigan, and the state's sixth largest city. It is located mostly in Ingham County, though a small portion of the city extends into Eaton County. Wikipedia
Area: 363 km2 calculated
Las Vegas, officially the City of Las Vegas and often known as simply Vegas, is the most populous city in the state of Nevada and the county seat of Clark County. Wikipedia