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_20124413_2 ( directed_by VARCHAR, prod_code VARCHAR )

### Question ###
How many directed have the product code of 2.8?

### Accurate SQL ###

SELECT COUNT(directed_by) FROM table_20124413_2 WHERE prod_code = "2.8"