Question: What is the gdp of the country with an area of 83871 (km2)?
SQL: SELECT "GDP (billion US$)" FROM "1-1307842-6" WHERE "Area (km²)" = 83871.0;

Question: What was the gdp of the country with a gdp per capita of $18048?
SQL: SELECT "GDP (billion US$)" FROM "1-1307842-6" WHERE "GDP per capita (US$)" = 18048.0;

Question: What is Austria's maximum area (km2)?
SQL: SELECT MAX("Area (km²)") FROM "1-1307842-6" WHERE "Member countries" = 'Austria';