A steel bar is 3 meters long, and it needs to be sawed into 5 sections. It takes 2 minutes to saw each time. How long does it take to finish sawing the steel bar?
一根钢筋长3米，要把它锯成5段，每锯一次要2分钟，锯完这根钢筋共要多长时间？
<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">2 * 4</gadget>
<output>8</output>

<result>8</result>