text: Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
  ### Context:
  CREATE TABLE table_2581397_3 (group VARCHAR, weight__kg_ VARCHAR)
  ### Question:
  How man teams had a total weight of 57.5?
  ### Answer:
  SELECT COUNT(group) FROM table_2581397_3 WHERE weight__kg_ = "57.5"