CREATE TABLE table_5619 ("Crop" TEXT, "Area" TEXT, "Output  ( 2007 ) " TEXT, "% of national" TEXT, "Main location ( s ) " TEXT)

What Main Location(s) has an Area of 19,800 HA?
SELECT "Main location(s)" FROM table_5619 WHERE "Area" = '19,800 ha'
SELECT "Main location(s)" FROM "table_5619" WHERE "Area" = '19,800 ha'