A road construction team wants to build a road. The ratio of the ones that have been repaired to the ones that have not been repaired is 3:4. The task will be completed after another 120 kilometers. What is the total length of this road in kilometers?
一个修路队要修一条公路，现在已经修的与没修的比是3：4，再修120千米就完成任务，这条路全长是多少千米？
<gadget id="calculator">3 + 4</gadget>
<output>7</output>

<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">120 / (4/7)</gadget>
<output>210</output>

<result>210</result>