user: Question: How many millions of U.S. viewers watched the episode with the production code of 3AJN01?
Columns: ['No. in series', 'No. in season', 'Title', 'Directed by', 'Written by', 'Original air date', 'Production code', 'U.S. viewers (millions)']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [43.0, 1.0, '" The Vacation Goo "', 'Albert Calleros', 'Josh Bycel & Jonathan Fener', 'September30,2007', '2AJN22', '6.07']
SQL:

assistant: SELECT "U.S. viewers (millions)" FROM "Table" WHERE "Production code" = '3AJN01';