Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_72 (area__km_2__ INTEGER, population__2000_ VARCHAR)
### Question:
What is the smallest area with 45 population?
### Answer:
SELECT MIN(area__km_2__) FROM table_name_72 WHERE population__2000_ = "45"