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_30 (game INTEGER, december VARCHAR, opponent VARCHAR)
### Question:
December larger than 21, and a Opponent of Pittsburgh penguins had what average game?
### Answer:
SELECT AVG(game) FROM table_name_30 WHERE december > 21 AND opponent = "pittsburgh penguins"