CREATE TABLE table_67871 ("Member countries" TEXT, "Population" FLOAT, "Area  ( km\\u00b2 ) " FLOAT, "GDP  ( billion US$ ) " FLOAT, "GDP per capita  ( US$ ) " TEXT)

What is the GDP of the place with over 54,292,038 people and an Area (km ) greater than 30,528?
SELECT MIN("GDP (billion US$)") FROM table_67871 WHERE "Population" > '54,292,038' AND "Area (km\u00b2)" > '30,528'
SELECT MIN("GDP (billion US$)") FROM "table_67871" WHERE "Area (km\u00b2)" > '30,528' AND "Population" > '54,292,038'