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_24027047_1 (population_density___km²_2011_ VARCHAR, area__km²__2011 VARCHAR)

### Question ###
What was the population density in km2 for 2011 in the division where area in km2 was 684.37 in 2011? 

### Accurate SQL ###

SELECT population_density___km²_2011_ FROM table_24027047_1 WHERE area__km²__2011 * * = "684.37"