Car A drives from point A to point B, and car B drives from point B to point A at the same time. When car A travels to the full distance (4/7), the ratio of the distance traveled by car B to the remaining distance is 3:2 , At this time the distance between the two cars is 120 km. Find the distance between A and B in kilometers?
甲车从A地开往B地，乙车同时从B地开往A地，当甲车行到全程的(4/7)时，乙车已行路程与剩下路程的比是3：2，这时两车相距120千米．求A、B两地相距多少千米？
<gadget id="calculator">6 / 35</gadget>
<output>6/35 = around 0.171429</output>

<gadget id="calculator">120 / (6/35)</gadget>
<output>700</output>

<result>700</result>