Which area has a telephone of (052) of 3862279?
CREATE TABLE "administrative_divisions" (
  "number" real,
  "name_of_administrative_unit" text,
  "telephone_052" text,
  "area_km_2" real,
  "population_people" real
);
SELECT "area_km_2" FROM "administrative_divisions" WHERE "telephone_052"='3862279';