The engineering team has built a highway, and it has already built 3000 meters, which is 600 meters longer than the total length (3/5). How long is the total length of the highway? (calculated by equation)
工程队修一条公路，已经修了3000米，已修的比全长的(3/5)多600米，公路全长多少米？(用方程计算)
<gadget id="calculator">3_000 - 600</gadget>
<output>2_400</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">2_400 / (3/5)</gadget>
<output>4_000</output>

<result>4_000</result>