Input (grade 7): The population density is 11,636.5 \/O/ km2 (30,239.2 \/O/ mi2), fourth highest in the nation after neighboring communities of Guttenberg, Union City and West New York.
Output (grade 3): The population density is 11,636.5 \/O/ kmÂ (30,239.2 \/O/ miÂ).