How many episodes were seen by 0.67 million US viewers on their original air dates?
CREATE TABLE table_13336122_7 (
    original_air_date VARCHAR,
    us_viewers__million_ VARCHAR
)
SELECT COUNT(original_air_date) FROM table_13336122_7 WHERE us_viewers__million_ = "0.67"
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: How many episodes were seen by 0.67 million US viewers on their original air dates? ### Input: CREATE TABLE table_13336122_7 (
    original_air_date VARCHAR,
    us_viewers__million_ VARCHAR
) ### Response: SELECT COUNT(original_air_date) FROM table_13336122_7 WHERE us_viewers__million_ = "0.67"