A 7-meter-long steel bar is sawed into 6 sections on average. If it takes 2 minutes to saw two sections, how many minutes will it take to saw it into 6 sections?
把一根7米长的钢筋平均锯成6段，如果锯成两段需2分钟，锯成6段共需多少分钟．
<gadget id="calculator">6 - 1</gadget>
<output>5</output>

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

<result>10</result>