Two trains of freight cars, A and B, depart from AB, which is 275 kilometers apart, at the same time. It is known that car A travels 53.2 kilometers per hour, which is 6.4 kilometers more than car B per hour. How long does it take for the two cars to meet?
甲、乙两列货车分别从相距275千米的AB两地同时相对开出，已知甲车每小时行53.2千米，比乙车每小时多行6.4千米，两车几小时相遇？
<gadget id="calculator">53.2 - 6.4</gadget>
<output>46.8</output>

<gadget id="calculator">53.2 + 46.8</gadget>
<output>100</output>

<gadget id="calculator">275 / 100</gadget>
<output>11/4 = around 2.75</output>

<result>11/4 = around 2.75</result>