When 1233 is the population of 2011 what is the land area in kilometers squared?
CREATE TABLE "northern_villages" (
  "name" text,
  "population_2011" real,
  "population_2006" real,
  "change_pct" text,
  "land_area_km" text,
  "population_density_per_km" text
);
SELECT "land_area_km" FROM "northern_villages" WHERE "population_2011"=1233;