user: Question: what is the total number of rounds when method is tko (punches) and time is 0:40?
Columns: ['Res.', 'Record', 'Opponent', 'Method', 'Event', 'Round', 'Time', 'Location']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['Win', '18-6', 'Brett Cooper', 'KO (punch)', 'Bellator 95', 1.0, '3:39', 'Atlantic City, New Jersey , United States']
SQL:

assistant: SELECT SUM("Round") FROM "Table" WHERE "Method" = 'tko (punches)' AND "Time" = '0:40';