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_2889810_2 (moto2_250cc VARCHAR, country VARCHAR)
### Question:
how many total number of moto2/250cc when country is united states
### Answer:
SELECT COUNT(moto2_250cc) FROM table_2889810_2 WHERE country = "United States"