The distance between A and B is 240 km. It takes 4 hours for a bus to travel from A to B, and 6 hours for a truck to travel from A to B. Two cars depart from places A and B at the same time and drive toward each other. How many hours later will they meet?
甲乙两地相距240km，客车从甲地到乙地需要4小时，货车从甲地到乙地需要6小时．两车同时从甲乙两地同时出发，相向而行，几小时后相遇？
<gadget id="calculator">240 / 4</gadget>
<output>60</output>

<gadget id="calculator">240 / 6</gadget>
<output>40</output>

<gadget id="calculator">60 + 40</gadget>
<output>100</output>

<gadget id="calculator">240 / 100</gadget>
<output>12/5 = around 2.4</output>

<result>12/5 = around 2.4</result>