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_94 (hanyu_pinyin VARCHAR, area__km²_ VARCHAR)
### Question:
What is the Hanyu Pinyin with an area of 400?
### Answer:
SELECT hanyu_pinyin FROM table_name_94 WHERE area__km²_ = "400"