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_37770 ( "Year" real, "Division" real, "League" text, "Reg. Season" text, "Playoffs" text )

### Question ###
Which Division that has a Reg Season of 1st, western, and Playoffs of champions, and a Year smaller than 2013?

### Accurate SQL ###

SELECT AVG("Division") FROM table_37770 WHERE "Reg. Season" = '1st, western' AND "Playoffs" = 'champions' AND "Year" < '2013'