CREATE TABLE table_62793 ("Name" TEXT, "Population  ( 2011 ) " FLOAT, "Population  ( 2006 ) " FLOAT, "Change  ( % ) " FLOAT, "Land area  ( km\\u00b2 ) " FLOAT, "Population density  ( per km\\u00b2 ) " FLOAT)

How much Population (2011) has a Land area (km ) larger than 15.69, and a Population density (per km ) larger than 57.3?
SELECT SUM("Population (2011)") FROM table_62793 WHERE "Land area (km\u00b2)" > '15.69' AND "Population density (per km\u00b2)" > '57.3'
SELECT SUM("Population (2011)") FROM "table_62793" WHERE "Land area (km\u00b2)" > '15.69' AND "Population density (per km\u00b2)" > '57.3'