A steel pipe is 4 meters long, and it needs to be sawed into 0.8-meter-long sections, each section takes up ((())/(())) of the total length. If each sawing takes 2 minutes, how many minutes will it take to complete the sawing?
一根钢管长4米，要锯成0.8米长的小段，每段占全长的((())/(()))，如果每锯一次要2分钟，锯完共要多少分钟．
<gadget id="calculator">4 / 0.8</gadget>
<output>5</output>

<gadget id="calculator">5 - 1</gadget>
<output>4</output>

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

<result>8</result>