user: Question: How many episodes had an audience of exactly 25.3 million viewers in the U.S.A.?
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', 'real', 'text']
Sample row: [74.0, 1.0, '"The One with the Jellyfish"', 'Shelley Jensen', 'Wil Calhoun', 'September25,1997', 466601.0, '29.4']
SQL:

assistant: SELECT COUNT("Production code") FROM "Table" WHERE "U.S. viewers (millions)" = '25.3';