Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_22170495_6 ( position_in_channel_4s_ratings_a VARCHAR, original_airing_on_channel_4 VARCHAR )

### Question ###
How many position in channel 4s ratings a have February 24, 2010 as the original airing on channel 4?

### Accurate SQL ###

SELECT COUNT(position_in_channel_4s_ratings_a) FROM table_22170495_6 WHERE original_airing_on_channel_4 = "February 24, 2010"