Two teams work together to build a road. The first team built 40% of the total length, and the second team built 420 kilometers. At this time, the number of kilometers repaired by the two teams is 380 kilometers less than the total length (2/3). How long is this road in kilometers?
两队合修一条路，第一队修了全长的40%，第二队修了420千米，这时两队修的千米数比全长的(2/3)少380千米．这条路全长多少千米？
<gadget id="calculator">380 - 380</gadget>
<output>0</output>

<gadget id="calculator">420 + 380 + 0</gadget>
<output>800</output>

<gadget id="calculator">4 / 15</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">800 / (4/15)</gadget>
<output>3_000</output>

<result>3_000</result>