CREATE TABLE table_67180 ("Season" CLOB, "Series" CLOB, "Team" CLOB, "Races" CLOB, "wins" CLOB, "Fast laps" CLOB, "Points" CLOB, "Pos." CLOB)

How many fast laps are in 6 races with 30 points in the World Series by Nissan?
SELECT "Fast laps" FROM table_67180 WHERE "Series" = 'world series by nissan' AND "Races" = '6' AND "Points" = '30'
SELECT "Fast laps" FROM "table_67180" WHERE "Points" = '30' AND "Races" = '6' AND "Series" = 'world series by nissan'