Cars A and B start at the same time from places A and B, which are 50 kilometers apart, and drive towards each other. When the two cars meet for the first time, car A travels 20 kilometers. Immediately return to the same road, then, how many kilometers did car A drive when they met for the second time?
甲、乙两车从相距50千米的A、B两地同时出发，相向而行，两车第一次相遇时甲车行了20千米，相遇后继续前进，分别到达B、A后都立即原路返回，那么，第二次相遇时甲车行了多少千米？
<gadget id="calculator">20 * 3</gadget>
<output>60</output>

<result>60</result>