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_10725629_2 (date VARCHAR, circuit VARCHAR)
### Question:
On how many dates did the Michigan International Speedway hold a round?
### Answer:
SELECT COUNT(date) FROM table_10725629_2 WHERE circuit = "Michigan International Speedway"