human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: No. in series, Title, Directed by, Written by, Original air date, Production code, U.S. viewers (million)
###Question: How many million U.S. viewers saw the episode with production code 3X5710?
gpt
SELECT U.S. viewers (million) FROM table WHERE Production code = 3X5710