What is the lowest number of matches that has a Clubs of 46 → 32?
CREATE TABLE "calendar" (
  "round" text,
  "date" text,
  "matches" real,
  "clubs" text,
  "new_entries_this_round" text,
  "prize_money" text
);
SELECT MIN("matches") FROM "calendar" WHERE "clubs"='46 → 32';