A, B, and C represent three stations. The distance from Station B to Station A and Station C is equal. Xiaogang and Xiaole start from Station A and Station C at the same time and walk towards each other. Xiaogang is 1.5 kilometers away from Station B. Meet Xiaole. Then the two continued to move forward. Xiao Gang returned immediately after arriving at Station C, and Xiao Le also returned immediately after arriving at Station A. The two met for the second time at a distance of 3 kilometers from Station A. What is the distance in miles between A and C?
甲、乙、丙表示三个车站，乙站到甲、丙站的距离相等，小刚和小乐分别从甲、丙两站同时出发，相向而行，小刚在过乙站1.5千米处与小乐相遇．然后两人又继续前进，小刚到丙站后立即返回，小乐到甲站后也立即返回，两人在距离甲站3千米处第二次相遇．甲、丙两站距离是多少千米．
<gadget id="calculator">1.5 * 2</gadget>
<output>3</output>

<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<gadget id="calculator">3 + 9 + 3</gadget>
<output>15</output>

<gadget id="calculator">2 - 1</gadget>
<output>1</output>

<gadget id="calculator">15 / 1</gadget>
<output>15</output>

<result>15</result>