To build a new urban area in Fengnan District, a 280-meter-long road needs to be built. Now it takes 3.5 days to build 24.5 meters. According to this calculation, how many days will it take to complete the rest? (Solution by proportional method)
丰南区建设新城区要修一条长280米的路，现在用3.5天就修了24.5米，照这样计算，剩下的还要几天完成？(用比例方法解)
<gadget id="calculator">280 * 3.5</gadget>
<output>980</output>

<gadget id="calculator">24.5 * 3.5</gadget>
<output>85.75</output>

<gadget id="calculator">980 - 85.75</gadget>
<output>894.25</output>

<gadget id="calculator">894.25 / 24.5</gadget>
<output>36.5</output>

<result>36.5</result>