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_27116696_1 (production_code VARCHAR, written_by VARCHAR)
### Question:
What is the total number of production code listings of episodes written by Matthew Lau?
### Answer:
SELECT COUNT(production_code) FROM table_27116696_1 WHERE written_by = "Matthew Lau"