Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_1307842_6 (gdp__billion_us$_ VARCHAR, area__km²_ VARCHAR)
### Question:
What is the gdp of the country with an area of 83871 (km2)?
### Answer:
SELECT gdp__billion_us$_ FROM table_1307842_6 WHERE area__km²_ = 83871