After a freight train travels from A to B for 2 hours, a passenger train departs from B to A. After 2 hours, the two trains meet. It is known that the speed of the truck is 4/5 of that of the passenger train. A and B are opposite each other, how many hours will they meet?
一列货车从甲地开往乙地2小时后，一列客车从乙地出发开往甲地，经过2小时两车相遇，已知货车的速度是客车的(4/5)，如果两车同时从甲、乙两地相对开出，几小时相遇？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">2 + 2</gadget>
<output>4</output>

<gadget id="calculator">(4/5) * 4</gadget>
<output>16/5 = around 3.2</output>

<gadget id="calculator">1 * 2</gadget>
<output>2</output>

<gadget id="calculator">(16/5) + 2</gadget>
<output>26/5 = around 5.2</output>

<gadget id="calculator">1 + (4/5)</gadget>
<output>9/5 = around 1.8</output>

<gadget id="calculator">(26/5) / (9/5)</gadget>
<output>26/9 = around 2.888889</output>

<result>26/9 = around 2.888889</result>