Dr. Li works the night shift tonight, starts work at 23:00, and leaves work at 6:00 the next day. How many hours does he work in total?
李医生今晚上夜班，从23：00上班，第二天6：00下班，一共上几小时班？
<gadget id="calculator">24 - 23</gadget>
<output>1</output>

<gadget id="calculator">1 + 6</gadget>
<output>7</output>

<result>7</result>