Lansing, Michigan is 49 times larger than Prospect Park (Brooklyn).
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: 2 km2 calculated
Prospect Park is a 585 acres public park in the New York City borough of Brooklyn located between Park Slope, Prospect-Lefferts Gardens, Ditmas Park, Windsor Terrace and Flatbush Avenue, Grand Army Plaza and the Brooklyn Botanic Garden. Wikipedia