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_21781578_2 (season_no VARCHAR, us_viewers__millions_ VARCHAR)
  ### Question:
  What was the number of season number entries that had US Viewers of 12.30 million?
  ### Answer:
  SELECT COUNT(season_no) FROM table_21781578_2 WHERE us_viewers__millions_ = "12.30"