truck and a motorcycle leave opposite places A and B at the same time. The two cars meet for the first time at a distance of 90 kilometers from A. After the meeting, the two cars continue to move forward. The truck arrives at B and the motorcycle arrives. Both returned immediately after point A, and the two vehicles met again on the way 50 kilometers away from point B. What is the distance in miles between A and B?
一辆卡车和一辆摩托车同时从A、B两地相对开出，两车在途中距A地90千米处第一次相遇，相遇后两车继续前进，卡车到达B地，摩托车到达A地后都立即返回，两车又在途中距B地50千米处相遇．A、B两地之间的距离是多少千米？
<gadget id="calculator">90 * 2</gadget>
<output>180</output>

<gadget id="calculator">50 * 2</gadget>
<output>100</output>

<gadget id="calculator">180 - 100</gadget>
<output>80</output>

<gadget id="calculator">90 + 80 + 50</gadget>
<output>220</output>

<result>220</result>