How many different series numbers are there for the episode seen by 7.84 million people in the US?
CREATE TABLE table_23242933_2 (no_in_series VARCHAR, us_viewers__millions_ VARCHAR)
SELECT COUNT(no_in_series) FROM table_23242933_2 WHERE us_viewers__millions_ = "7.84"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_23242933_2 (no_in_series VARCHAR, us_viewers__millions_ VARCHAR) Question: How many different series numbers are there for the episode seen by 7.84 million people in the US? [/INST] SELECT COUNT(no_in_series) FROM table_23242933_2 WHERE us_viewers__millions_ = "7.84" </s>