CREATE TABLE table_21873 ("Stage" FLOAT, "Winner" TEXT, "General Classification" TEXT, "Mountains Classification" TEXT, "Points Classification" TEXT, "Sprints classification" TEXT, "Team Classification" TEXT)

How many stages were won by Robbie McEwen?
SELECT COUNT("Stage") FROM table_21873 WHERE "Winner" = 'Robbie McEwen'
SELECT COUNT("Stage") FROM "table_21873" WHERE "Winner" = 'Robbie McEwen'