Baton Rouge, Louisiana is 5.7 times larger than Lowell, Massachusetts.
Area: 214 km2 calculated
Baton Rouge, French for "Red Stick," is the capital of the U.S. state of Louisiana and its second-largest city. The seat of East Baton Rouge Parish, the city is located on the banks of the Mississippi River. Wikipedia
Area: 38 km2 calculated
Lowell is a city in Middlesex County, Massachusetts, in the United States. With an estimated population of 108,522, it is the fourth-largest city in Massachuetts, after Boston, Worcester, and Springfield, and the second-largest in what the U.S. Census Bureau defines as Boston's metropolitan area. Wikipedia