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_67180 ( "Season" text, "Series" text, "Team" text, "Races" text, "wins" text, "Fast laps" text, "Points" text, "Pos." text )

### Question ###
How many fast laps are in 6 races with 30 points in the World Series by Nissan?

### Accurate SQL ###

SELECT "Fast laps" FROM table_67180 WHERE "Series" = 'world series by nissan' AND "Races" = '6' AND "Points" = '30'