What's the population density of the Democratic Republic of the Congo when the population is greater than 37,762,842, and the arable land is more than 200 km²?
CREATE TABLE "ranking" (
  "country" text,
  "population_july_2005_est" real,
  "land_area_km" real,
  "pct_of_arable_land_2005_est" text,
  "arable_land_km" real,
  "population_density_pop_per_km" real
);
SELECT "population_density_pop_per_km" FROM "ranking" WHERE "population_july_2005_est">'37,762,842' AND "arable_land_km">200 AND "country"='democratic republic of the congo';