Two people, A and B, ride towards each other from A and B at the same time. They meet for the first time at a distance of 1.8 kilometers from A. After meeting, they continue to move forward and return immediately after reaching the destination. The second time they meet is 0.6 kilometers away from B. In kilometers, how many kilometers are the distance between the two places?
甲乙两人同时从A、B两地骑车相向而行，第一次在距A地1.8千米处相遇，相遇后继续前进到达目的地后，立即返回，第二次相遇在距B地0.6千米处，两地距离多少千米．
<gadget id="calculator">3 * 1.8</gadget>
<output>5.4</output>

<gadget id="calculator">5.4 - 0.6</gadget>
<output>4.8</output>

<result>4.8</result>