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_12146637_1 (episode_title VARCHAR, us_viewers__millions_ VARCHAR)
### Question:
How many episodes had 9.90 million viewers?
### Answer:
SELECT COUNT(episode_title) FROM table_12146637_1 WHERE us_viewers__millions_ = "9.90"