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_1104312_5 (english_name VARCHAR, area_in_km² VARCHAR)
### Question:
How many districts have an area of 17.72 KM2?
### Answer:
SELECT COUNT(english_name) FROM table_1104312_5 WHERE area_in_km² = "17.72"