Two cars, A and B, drive from A to B at the same time. Car A returns immediately after arriving at point B, and meets car B at a distance of 45 kilometers from point B. The speed ratio of car A and car B is 3:2. How many kilometers did car A drive when they met?
甲乙两车同时从A地开往B地．甲车到达B地后立即返回，在离B地45千米处与乙车相遇，甲乙两车的速度比是3：2，相遇时甲车行了多少千米？
<gadget id="calculator">3 - 2</gadget>
<output>1</output>

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

<gadget id="calculator">45 * 2 * 3</gadget>
<output>270</output>

<result>270</result>