Table schema:
CREATE TABLE table_name_60 (area_km_2 VARCHAR, census_ranking VARCHAR, population VARCHAR)

Question: What is the total area with the census ranking of 3,129 of 5,008, and a Population smaller than 460?
SQL: SELECT COUNT(area_km_2) FROM table_name_60 WHERE census_ranking = "3,129 of 5,008" AND population < 460