The distance between A and B is 560 kilometers. A passenger train and a freight train pass from the two cities at the same time. It is known that the truck travels 50 kilometers per hour, the passenger car starts after traveling 120 kilometers, and the passenger car travels 60 kilometers per hour. How many hours after the truck leaves, the two vehicles meet?
甲、乙两城相距560千米，一列客车和一列货车同时从两城对开．已知货车每小时行50千米，行了120千米后客车才出发，客车每小时行60千米，货车开出几小时后两车相遇？
<gadget id="calculator">560 - 120</gadget>
<output>440</output>

<gadget id="calculator">50 + 60</gadget>
<output>110</output>

<gadget id="calculator">440 / 110</gadget>
<output>4</output>

<gadget id="calculator">120 / 50</gadget>
<output>12/5 = around 2.4</output>

<gadget id="calculator">4 + (12/5)</gadget>
<output>32/5 = around 6.4</output>

<result>32/5 = around 6.4</result>