user: Question: What is the GDP (billion US$) of the country that has an Area (km²) of 316?
Columns: ['Member countries', 'Population', 'Area (km²)', 'GDP (billion US$)', 'GDP per capita (US$)']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Cyprus', '775,927', '9,250', '11.681', '15,054']
SQL:

assistant: SELECT "GDP (billion US$)" FROM "Table" WHERE "Area (km²)" = '316';