A piece of steel is 24 meters long and needs to be sawed into 4-meter sections. Each sawing takes 2.5 minutes. How long does it take to finish sawing this piece of steel?
一根钢材长24米，需要锯成每段4米的材料，每锯一次需要2.5分钟，锯完这根钢材一共需要多长时间？
<gadget id="calculator">24 / 4</gadget>
<output>6</output>

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

<gadget id="calculator">5 * 2.5</gadget>
<output>12.5</output>

<result>12.5</result>