Cars A and B leave opposite places A and B at the same time. They meet for the first time at a distance of 75 kilometers from place A. After meeting, the two cars continue to move forward and return to their destination. The second time they meet, they are 55 kilometers away from place B. What is the distance in kilometers between A and B?
甲、乙两车同时从A、B两地相对开出，第一次在离A地75千米处相遇，相遇后两车继续前进，到达目的地返回，第二次相遇离B地55千米处，A、B两地相距多少千米．
<gadget id="calculator">75 * 3</gadget>
<output>225</output>

<gadget id="calculator">225 - 55</gadget>
<output>170</output>

<result>170</result>