Two trains A and B leave opposite each other from two places 595 kilometers apart. Train A travels 62.5 kilometers per hour, and train B travels 55 kilometers per hour. Train A starts first, and train B leaves after 2 hours. How many hours later will the two trains meet?
甲乙两列火车从相距595千米的两地相对开出．甲火车每小时行62.5千米，乙火车每小时行55千米，甲火车先出发，2小时后乙火车开出，再经过几小时两车相遇？
<gadget id="calculator">62.5 * 2</gadget>
<output>125</output>

<gadget id="calculator">595 - 125</gadget>
<output>470</output>

<gadget id="calculator">62.5 + 55</gadget>
<output>117.5</output>

<gadget id="calculator">470 / 117.5</gadget>
<output>4</output>

<result>4</result>