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_40 (year INTEGER, weight__kg_ VARCHAR)
### Question:
What is the sum total of all the years with a bell that weighed 857 kilograms?
### Answer:
SELECT SUM(year) FROM table_name_40 WHERE weight__kg_ = "857"