There is a wall clock that rings once every hour, and the number of times it rings at what time, the clock rings 7 times, and it takes 6 seconds to ring, and the clock rings 11 times, how many seconds it finishes ringing.
有一个挂钟，每小时敲一次钟，几点钟就敲几下，钟敲7下，6秒钟敲完，钟敲11下，多少秒钟敲完．
<gadget id="calculator">7 - 1</gadget>
<output>6</output>

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

<gadget id="calculator">11 - 1</gadget>
<output>10</output>

<gadget id="calculator">1 * 10</gadget>
<output>10</output>

<result>10</result>