Name the least area for vas
CREATE TABLE "table1_16278825_1" (
  "name_of_county" text,
  "county_seat" text,
  "area_km" real,
  "population" real,
  "population_density" real,
  "towns_villages" real
);
SELECT MIN("area_km") FROM "table1_16278825_1" WHERE "name_of_county"='Vas';