Dad starts the night shift at 8:00 in the evening and leaves work at 6:30 the next morning. How much does Dad work on a night shift?
爸爸晚上8：00上夜班，第二天早上6：30下班．爸爸上一个夜班的工作时间是多少．
<gadget id="calculator">4 + 6.5</gadget>
<output>10.5</output>

<result>10.5</result>