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_12 (currency VARCHAR, central_rate VARCHAR)
### Question:
Which currency has a central rate of 0.702804?
### Answer:
SELECT currency FROM table_name_12 WHERE central_rate = "0.702804"