The time indicated by the clock is 14:00, what is the time indicated by the clock after the minute hand rotates 1991 times?
时钟现在表示的时间是14时正，那么分针旋转1991周后，时钟表示的时间是多少时
<gadget id="calculator">23 - 24</gadget>
<output>-1</output>

<gadget id="calculator">14 + (-1)</gadget>
<output>13</output>

<result>13</result>