Cars A and B leave opposite places A and B at the same time. The two cars meet for the first time at a distance of 70 kilometers from place A. After meeting, they continue to move forward and return immediately after reaching the end point. When they meet for the second time at meters, how many kilometers are there between A and B?
甲、乙两车同时从A、B两地相对开出，两车第一次在离A地70千米处相遇，相遇后继续前进，到达终点后立即返回，两车在距离B地50千米处第二次相遇，求A、B两地相距多少千米？
<gadget id="calculator">70 * 3</gadget>
<output>210</output>

<gadget id="calculator">210 - 50</gadget>
<output>160</output>

<result>160</result>