Cars A and B travel towards each other from the two cities of AB at the same time. Car A travels 40.2 kilometers per hour, and car B travels 42.4 kilometers per hour. After 3.5 hours, the two cars meet. How many miles is the distance between AB and AB?
甲乙两车从AB两城同时相向而行，甲车每小时行40.2千米，乙车每小时行42.4千米，经过3.5小时两车相遇．AB两城相距多少千米？
<gadget id="calculator">40.2 + 42.4</gadget>
<output>82.6</output>

<gadget id="calculator">82.6 * 3.5</gadget>
<output>289.1</output>

<result>289.1</result>