In what week was the game on August 24, 1956 played in front of 40,175 fans?
CREATE TABLE "exhibition_schedule" (
  "week" real,
  "date" text,
  "opponent" text,
  "result" text,
  "attendance" real
);
SELECT MAX("week") FROM "exhibition_schedule" WHERE "date"='august 24, 1956' AND "attendance">'40,175';