CREATE TABLE table_37316 ("Club" TEXT, "Played" TEXT, "Drawn" TEXT, "Lost" TEXT, "Points for" TEXT, "Points against" TEXT, "Tries for" TEXT, "Tries against" TEXT, "Try bonus" TEXT)

What were the points for that had a game where there was 678 against?
SELECT "Points for" FROM table_37316 WHERE "Points against" = '678'
SELECT "Points for" FROM "table_37316" WHERE "Points against" = '678'