Car A and car B leave at the same time from two places 594 kilometers apart. Car A travels 54 kilometers per hour, and car B travels 45 kilometers per hour. After how many hours do they meet?
甲、乙两车从相距594千米的两地同时开出，甲车每小时行54千米，乙车每小时行45千米，经过几小时相遇？
<gadget id="calculator">54 + 45</gadget>
<output>99</output>

<gadget id="calculator">594 / 99</gadget>
<output>6</output>

<result>6</result>