It takes 270 minutes to play a TV series. If it is played from 17:00 to 17:30 every day, how many days can it be played?
播放一部电视剧需要270分钟，如果每天从17：00播放到17：30，多少天能播放完？
<gadget id="calculator">270 / 30</gadget>
<output>9</output>

<result>9</result>