When 24th is the final placing how many wins are there?
CREATE TABLE "career_summary" (
  "season" real,
  "series" text,
  "team_name" text,
  "races" real,
  "wins" real,
  "poles" real,
  "podiums" real,
  "points" real,
  "final_placing" text
);
SELECT COUNT("wins") FROM "career_summary" WHERE "final_placing"='24th';