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_51 ( goal_difference VARCHAR, club VARCHAR, played VARCHAR )

### Question ###
what is the total number of goal different when the club is cf extremadura and the played is less than 38?

### Accurate SQL ###

SELECT COUNT(goal_difference) FROM table_name_51 WHERE club = "cf extremadura" AND played < 38