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_78 (total_population__2005_estimate_ INTEGER, province VARCHAR, area__km_2__ VARCHAR)

### Question ###
Which Total population (2005 estimate) has a Province of west kalimantan (kalimantan barat), and an Area (km 2) smaller than 147,307.00?

### Accurate SQL ###

SELECT AVG(total_population__2005_estimate_) FROM table_name_78 WHERE province = "west kalimantan (kalimantan barat)" AND area__km_2__ < 147 OFFSET 307.00