Two cars, A and B, start from A and B at the same time and drive towards each other. Car A travels 84 kilometers per hour, and car B travels 75.5 kilometers per hour. After a period of time, the two cars meet on the way. When they meet, car A travels 20.4 kilometers longer than car B. Find the distance between places A and B.
甲、乙两辆汽车同时从A、B两地出发，相向而行，甲车每时行84千米，乙车每时行75.5千米．一段时间后两车在途中相遇，相遇时甲车比乙车多行20.4千米，求A、B两地的距离．
<gadget id="calculator">84 - 75.5</gadget>
<output>8.5</output>

<gadget id="calculator">20.4 / 8.5</gadget>
<output>2.4</output>

<gadget id="calculator">84 + 75.5</gadget>
<output>159.5</output>

<gadget id="calculator">2.4 * 159.5</gadget>
<output>382.8</output>

<result>382.8</result>