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_name_15 ( kilometer INTEGER, average_climb___percentage_ VARCHAR, name VARCHAR, pavement VARCHAR, length__m_ VARCHAR )

### Question ###
What is the Kilometer of the Berendries asphalt course with an Average climb less than 7 and Length (m) longer than 645?

### Accurate SQL ###

SELECT AVG(kilometer) FROM table_name_15 WHERE pavement = "asphalt" AND length__m_ > 645 AND name = "berendries" AND average_climb___percentage_ < 7