New Caledonia is 316 times larger than Manhattan (NYC borough).
Area: 18,575 km2 World Factbook
Population: 267,840 (July 2014) World Factbook
New Caledonia is a special collectivity of France located in the southwest Pacific Ocean, 1,210 km east of Australia and 16,136 km east of Metropolitan France. Wikipedia
Area: 59 km2 calculated
Manhattan is the most densely populated of the five boroughs of New York City. The borough is coterminous with New York County, an original county of the U.S. state of New York. Wikipedia