CREATE TABLE table_57640 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

What is the crowd number for the event that has a score of 8.25 (73) for the Away team?
SELECT COUNT("Crowd") FROM table_57640 WHERE "Away team score" = '8.25 (73)'
SELECT COUNT("Crowd") FROM "table_57640" WHERE "Away team score" = '8.25 (73)'