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_30133_1 ( current_account_balance__percent_of_gdp_ VARCHAR, gdp_at_current_prices__usd_billions_ VARCHAR )

### Question ###
What is the current account balance for a GDP at current prices of 142.640?

### Accurate SQL ###

SELECT current_account_balance__percent_of_gdp_ FROM table_30133_1 WHERE gdp_at_current_prices__usd_billions_ = "142.640"