Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_1307842_6 (gdp__billion_us$_ VARCHAR, gdp_per_capita__us$_ VARCHAR)

### Question ###
What was the gdp of the country with a gdp per capita of $18048?

### Accurate SQL ###

SELECT gdp__billion_us$_ FROM table_1307842_6 WHERE gdp_per_capita__us$_ = 18048