Table schema:
CREATE TABLE table_name_78 (area_in_km² INTEGER, original_name VARCHAR, number_of_settlements_and_villages VARCHAR)

Question: There are less than 11 settlements in Kecamatan Bogor Tengah, what is the area in km²?
SQL: SELECT SUM(area_in_km²) FROM table_name_78 WHERE original_name = "kecamatan bogor tengah" AND number_of_settlements_and_villages < 11