Table: eu_enlargement_stats
Columns: member_countries
population
area_km
gdp_billion_us
gdp_per_capita_us

Question: What is the gdp of the country with an area of 83871 (km2)?
SQL: SELECT "gdp_billion_us" FROM eu_enlargement_stats WHERE "area_km" = 83871

Question: What was the gdp of the country with a gdp per capita of $18048?
SQL: SELECT "gdp_billion_us" FROM eu_enlargement_stats WHERE "gdp_per_capita_us" = 18048

Question: What is Austria's maximum area (km2)?
SQL: SELECT MAX("area_km") FROM eu_enlargement_stats WHERE "member_countries" = 'Austria'