user: Question: For the city whose land area was 135.09, what was the total population density?
Columns: ['Rank', 'Incorporated place', 'Metropolitan area', 'State', 'Population (2010 census)', 'Land area (mi 2 )', 'Population density (people per mi 2 )']
Types: ['real', 'text', 'text', 'text', 'real', 'text', 'text']
Sample row: [1.0, 'Guttenberg', 'New York City', 'New Jersey', 11176.0, '0.19', '58,821']
SQL:

assistant: SELECT SUM("Population density (people per mi 2 )") FROM "Table" WHERE "Land area (mi 2 )" = '135.09';