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_46367 ( "Year" real, "Show" text, "Season" real, "Episode" text, "Episode number" real, "Original airdate" text )

### Question ###
What is the average Episode Number, when Original Airdate is March 21, 2010, and when Season is less than 3?

### Accurate SQL ###

SELECT AVG("Episode number") FROM table_46367 WHERE "Original airdate" = 'march 21, 2010' AND "Season" < '3'