If it takes 2 minutes to saw a piece of steel into 3 sections, how many minutes will it take to saw it into 12 sections?
一根钢材锯成3段需要2分钟，锯成12段需要多少分钟．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

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

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

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

<result>11</result>