1 hour = 60 minutes
1 minute = 60 seconds.
Saturn: 10 hours 39 minutes and 24 seconds.
Convert hours to minutes: 10 hours x 60 minutes per hour = 600 minutes.
Convert seconds to minutes: 24 seconds / 60 seconds per minute = 0.4 minutes.
Total time for Saturn : 600 minutes + 39 minutes + 0.4 minutes = 639.4 minutes