what is all the broadcast date when viewers were 8.4 millions
CREATE TABLE table_2112766_1 (
    broadcast_date VARCHAR,
    viewers__in_millions_ VARCHAR
)
SELECT COUNT(broadcast_date) FROM table_2112766_1 WHERE viewers__in_millions_ = "8.4"
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: what is all the broadcast date when viewers were 8.4 millions ### Input: CREATE TABLE table_2112766_1 (
    broadcast_date VARCHAR,
    viewers__in_millions_ VARCHAR
) ### Response: SELECT COUNT(broadcast_date) FROM table_2112766_1 WHERE viewers__in_millions_ = "8.4"