Two cars, passenger and freight, depart from two stations 625 kilometers apart at the same time. It is known that the passenger car travels 70 kilometers per hour and the freight train travels 55 kilometers per hour. How many hours does it take for the two cars to meet?
客、货两辆汽车同时从相距625千米的两个车站相对开出，已知客车每小时行70千米，货车每小时行55千米，经过多少小时两车相遇？
<gadget id="calculator">70 + 55</gadget>
<output>125</output>

<gadget id="calculator">625 / 125</gadget>
<output>5</output>

<result>5</result>