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_171666_1 (administrative_division VARCHAR, area__km²_ VARCHAR)

### Question ###
What is the administrative division that has an area of 30 km^2?

### Accurate SQL ###

SELECT administrative_division FROM table_171666_1 WHERE area__km²_ = 30