If it is 11 o'clock now, how many minutes later, the hour and minute hands are vertical for the first time.
假如现在是11点整，那么再过多少分，时针和分针第一次垂直．
<gadget id="calculator">120 / 11</gadget>
<output>120/11 = around 10.909091</output>

<result>120/11 = around 10.909091</result>