Name the sum of land for ANSI code of 2390496 and population less than 7,284
CREATE TABLE "census_designated_places_in_new_york" (
  "cdp_name" text,
  "county" text,
  "pop_2010" real,
  "land_sq_mi" real,
  "water_sq_mi" real,
  "coordinates" text,
  "fips_code" real,
  "ansi_code" real
);
SELECT SUM("land_sq_mi") FROM "census_designated_places_in_new_york" WHERE "ansi_code"=2390496 AND "pop_2010"<'7,284';