If it takes 2 minutes to cut a steel bar into 2 pieces, how many minutes will it take to cut it into 6 pieces?
把一根钢筋，锯成每段一样长的小段，如果锯成两段需要2分钟，那么锯成6段需要多少分钟．
<gadget id="calculator">2 - 1</gadget>
<output>1</output>

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

<gadget id="calculator">6 - 1</gadget>
<output>5</output>

<gadget id="calculator">2 * 5</gadget>
<output>10</output>

<result>10</result>