Cut a 40 cm long iron wire into 8 cm long pieces, each cut takes 2 minutes, how many minutes will it take in total?
40厘米长的铁丝剪成8厘米长的小段，每剪一次用2分钟，一共需要几分钟？
<gadget id="calculator">40 / 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>