Two cars A and B drive towards each other at the same time from two places 540 kilometers apart. Car A travels 48 kilometers per hour, and car B travels 42 kilometers per hour. After how many hours can the two cars meet?
甲乙两辆汽车同时从相距540千米的两地相向开出，甲车每小时行48千米，乙车每小时行42千米，经过几小时两车可以相遇？
<gadget id="calculator">48 + 42</gadget>
<output>90</output>

<gadget id="calculator">540 / 90</gadget>
<output>6</output>

<result>6</result>