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_1180228_1 ( num_of_discs VARCHAR, duration VARCHAR )

### Question ###
What is the total number of discs where the run time was 4 hours 40 minutes?

### Accurate SQL ###

SELECT COUNT(num_of_discs) FROM table_1180228_1 WHERE duration = "4 hours 40 minutes"