It is now 9 o'clock, how many minutes later, the clock and the minute hand are vertical again.
现在是9点整，再过多少分钟，时钟和分针再一次垂直．
<gadget id="calculator">180 / 11</gadget>
<output>180/11 = around 16.363636</output>

<result>180/11 = around 16.363636</result>