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_16409745_1 (dpi VARCHAR, max_page_size VARCHAR)
### Question:
What is the dpi for the scanner with a max page size of 216mm x 355mm?
### Answer:
SELECT dpi FROM table_16409745_1 WHERE max_page_size = "216mm x 355mm"