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_27277284_27 ( mult_1 VARCHAR, frequency VARCHAR )

### Question ###
What are the possible multipliers for 1900MHz processors?

### Accurate SQL ###

SELECT mult_1 FROM table_27277284_27 WHERE frequency = "1900MHz"