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_38 (service_charge VARCHAR, number_made VARCHAR)

### Question ###
What is the service charge of the boat howitzers with 456 made?

### Accurate SQL ###

SELECT service_charge FROM table_name_38 WHERE number_made = 456