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_57 ( dvd_title VARCHAR, region_1 VARCHAR, no_of_discs VARCHAR )

### Question ###
Which DVD Title has a Region 1 of n/a and greater than 3 in No. of Discs?

### Accurate SQL ###

SELECT dvd_title FROM table_name_57 WHERE region_1 = "n/a" AND no_of_discs > 3