What is the area for a population of 0.58 km?
CREATE TABLE "regions_of_iceland" (
  "landsv_i" text,
  "english" text,
  "population_2011_01_01" text,
  "area_km" text,
  "pop_km" real
);
SELECT "area_km" FROM "regions_of_iceland" WHERE "pop_km"=0.58;