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_2889810_2 (country VARCHAR, moto3_125cc VARCHAR)

### Question ###
how many country has moto3/125cc with 15

### Accurate SQL ###

SELECT country FROM table_2889810_2 WHERE moto3_125cc = 15