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_73 (overall VARCHAR, round VARCHAR, pick VARCHAR)
### Question:
WHAT IS THE TOTAL NUMBER WITH A ROUND BIGGER THAN 7 AND PICK OF 21?
### Answer:
SELECT COUNT(overall) FROM table_name_73 WHERE round > 7 AND pick = 21