CREATE TABLE table_43570 ("landsv\\u00e6\\u00f0i" TEXT, " ( English ) " TEXT, "Population 2011-01-01" TEXT, "Area  ( km\\u00b2 ) " TEXT, "Pop./ km\\u00b2" FLOAT)

What is the area for a population of 0.58 km?
SELECT "Area (km\u00b2)" FROM table_43570 WHERE "Pop./ km\u00b2" = '0.58'
SELECT "Area (km\u00b2)" FROM "table_43570" WHERE "Pop./ km\u00b2" = '0.58'