A road construction team wants to build a 240-meter-long road, and it has built 60 meters in the first 3 days. At this speed, how many days will it take to complete the task?
一个修路队要修一条长240米的路，前3天修了60米，照这样的速度，还需要多少天才能完成任务？
<gadget id="calculator">240 - 60</gadget>
<output>180</output>

<gadget id="calculator">60 / 3</gadget>
<output>20</output>

<gadget id="calculator">180 / 20</gadget>
<output>9</output>

<result>9</result>