The distance between A and B is 70 kilometers. Two cars start from the two places at the same time and drive towards each other. Car A travels 42 kilometers per hour, and car B travels 38 kilometers per hour. When will the two cars meet?
甲、乙两地相距70千米，两辆汽车同时从两地出发，相向而行，甲车每时行驶42千米，乙车每时行驶38千米，几时后两车相遇？
<gadget id="calculator">42 + 38</gadget>
<output>80</output>

<gadget id="calculator">70 / 80</gadget>
<output>7/8 = around 0.875</output>

<result>7/8 = around 0.875</result>