How many times more is the number of games which were published by Atari than Athena?
published by Atari refers to publisher_name = 'Atari'; published by  Athena refers to publisher_name = 'Athena'; times = divide(sum(publisher_id where publisher_name = 'Atari'), sum(publisher_id where publisher_name = 'Athena'))
SELECT CAST(COUNT(CASE WHEN T1.publisher_name = 'Atari' THEN T2.game_id ELSE NULL END) AS REAL) / COUNT(CASE WHEN T1.publisher_name = 'Athena' THEN T2.game_id ELSE NULL END) FROM publisher AS T1 INNER JOIN game_publisher AS T2 ON T1.id = T2.publisher_id