Playback Duration

YouTube offers different playback speed options for users. This allows users to increase or decrease the speed of the video content. Given the actual duration and playback speed of the video, calculate the playback duration of the video.

Examples

playback_duration("00:30:00", 2) ➞ "00:15:00"

playback_duration("01:20:00", 1.5) ➞ "00:53:20"

playback_duration("51:20:09", 0.5) ➞ "102:40:18"

Notes

• Both durations will be in hh:mm:ss format.
• Playback speed will be up to one decimal place only.
• Time units are expected to be truncated/floored.