user: Question: what is the total number o production code where us viewers is 2.76?
Columns: ['No.', 'Title', 'Directed by', 'Written by', 'Original air date', 'Production code', 'U.S. viewers (million)']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, '" Pilot "', 'Mark Piznarski', 'Rob Thomas', 'September22,2004', '475258', '2.49']
SQL:

assistant: SELECT COUNT("Production code") FROM "Table" WHERE "U.S. viewers (million)" = '2.76';