When Wang Gang travels from A to B, the ratio of the distance traveled to the remaining distance is 1:4. If he travels another 16 kilometers, the ratio of the distance traveled to the whole journey is 3:7. How many kilometers are the distance between A and B? ?
王刚从甲地到乙地，已行的路程和剩下路程的比是1：4，如果再行16千米，已行的路程和全程的比是3：7，甲乙两地相距多少千米？
<result>210</result>