The road construction team built a road in three days. On the first day, 20% of the total length was repaired, on the second day, 200 meters were repaired, and on the third day, it was the sum of the previous two days. How many meters is the total length of this road?
修路队用三天时间修一条路，第一天修了全长的20%，第二天修了200米，第三天是前两天的总和，这条路全长多少米？
<gadget id="calculator">1 - 0.4</gadget>
<output>0.6</output>

<gadget id="calculator">400 / 0.6</gadget>
<output>666.666667</output>

<result>666.666667</result>