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_16 ( population__2010_census_ INTEGER, administrative_division VARCHAR, area__km²_ VARCHAR )

### Question ###
What was the sum of the population in 2010 for the division of japeri with an area of 82.9 squared km?

### Accurate SQL ###

SELECT SUM(population__2010_census_) FROM table_name_16 WHERE administrative_division = "japeri" AND area__km²_ < 82.9