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_20667854_1 (gics_sector VARCHAR, free_float VARCHAR)

### Question ###
What is every GICS sector for free float of 0.3180?

### Accurate SQL ###

SELECT gics_sector FROM table_20667854_1 WHERE free_float = "0.3180"