What population has an area (km²) of 62,848 and a density less than 37.7?
CREATE TABLE "by_density" (
  "rank" text,
  "state" text,
  "population" real,
  "area_km" real,
  "density" real
);
SELECT COUNT("population") FROM "by_density" WHERE "area_km"='62,848' AND "density"<37.7;