There is a wall clock that rings the clock once every hour, and the clock strikes a few times at what time, the clock strikes 6 times, and the clock strikes in 5 seconds, and the clock strikes 12 times, how many seconds are completed.
有一个挂钟，每小时敲一次钟，几点钟就敲几下，钟敲6下，5秒钟敲完，钟敲12下，多少秒钟敲完．
<gadget id="calculator">6 - 1</gadget>
<output>5</output>

<gadget id="calculator">5 / 5</gadget>
<output>1</output>

<gadget id="calculator">12 - 1</gadget>
<output>11</output>

<gadget id="calculator">11 * 1</gadget>
<output>11</output>

<result>11</result>