The clock strikes 2 times at 2 o'clock, and the knocking is over in 2 seconds. Knock 12 times at 12 o'clock, how many seconds can the knock be finished?
时钟2点敲2下，2秒钟敲完．12点敲了12下，多少秒可以敲完．
<gadget id="calculator">2 - 1</gadget>
<output>1</output>

<gadget id="calculator">2 / 1</gadget>
<output>2</output>

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

<gadget id="calculator">2 * 11</gadget>
<output>22</output>

<result>22</result>