The distance between A and B is 174 kilometers. Cars A and B drive towards each other at the same time. A travels 30 kilometers per hour, and B travels 28 kilometers per hour. How long will they meet?
甲、乙两地相距174千米，甲乙两车同时相向开出，甲每小时行30千米，乙每小时行28千米，几小时相遇？
<gadget id="calculator">30 + 28</gadget>
<output>58</output>

<gadget id="calculator">174 / 58</gadget>
<output>3</output>

<result>3</result>