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_name_7 ( capital VARCHAR, area_in_1000km²__1930_ VARCHAR )

### Question ###
tell me the name of the capital with an area of 20,4.

### Accurate SQL ###

SELECT capital FROM table_name_7 WHERE area_in_1000km²__1930_ = "20,4"