The road construction team wants to build a road, and 20 people work for 5 days to build a road of 2.5 kilometers. According to this calculation, 50 people can work 25 days to complete this road. How many kilometers is this road?
修路队要修一条公路，20人工作5天修路2.5千米．照这样计算，50人工作25天可以修完这条路，这条公路长多少千米？
<gadget id="calculator">2.5 / 20 / 5</gadget>
<output>0.025</output>

<gadget id="calculator">0.025 * 50 * 25</gadget>
<output>31.25</output>

<result>31.25</result>