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_7 (construct__tion_no INTEGER, wheel_arrange__ment VARCHAR)
### Question:
How many constructions has a Wheel arrange- ment of 4-4-0?
### Answer:
SELECT SUM(construct__tion_no) FROM table_name_7 WHERE wheel_arrange__ment = "4-4-0"