The distance between A and B is 408 kilometers. A train departs from A and travels an average of 68 kilometers per hour. How long does it take to reach B? (List the equations containing the unknown X, and then solve it)
甲、乙两地相距408千米，一列火车从甲地开出，平均每小时行68千米，多少小时可以到达乙地？(列出含有未知数X的等式，再解出来)
<gadget id="calculator">408 / 68</gadget>
<output>6</output>

<result>6</result>