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_24463470_1 (setting VARCHAR, unlocked_by VARCHAR)
### Question:
How many instances is the unlocked n/a?
### Answer:
SELECT COUNT(setting) FROM table_24463470_1 WHERE unlocked_by = "N/A"