CREATE TABLE table_176529_2 (official_name VARCHAR2, area_km_2 VARCHAR2)

What is the name of the place with 582.20 square km area?
SELECT official_name FROM table_176529_2 WHERE area_km_2 = "582.20"
SELECT "official_name" FROM "table_176529_2" WHERE "582.20" = "area_km_2"