CREATE TABLE table_name_30 (area__km²_ INTEGER, name_of_community VARCHAR(255), excised_from VARCHAR(255), population VARCHAR(255))
What is the average Area (km²) that shows Excised from shire of cook and a Population smaller than 463 for the community of wujal wujal (bloomfield river)?
    
SQL: SELECT AVG(area__km²_) FROM table_name_30 WHERE excised_from = "shire of cook" AND population < 463 AND name_of_community = "wujal wujal (bloomfield river)"