A train goes from station A to station B, and it takes 4.5 hours to travel the whole journey (5/6). According to this calculation, how many hours will it take to reach station B?
一列火车从甲站开往乙站，4.5小时行全程的(5/6)，照这样计算，还要几小时可以到达乙站？
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">(5/6) / 4.5</gadget>
<output>0.185185</output>

<gadget id="calculator">1 / 0.185185</gadget>
<output>5.400005</output>

<gadget id="calculator">5.400005 - 4.5</gadget>
<output>0.900005</output>

<result>0.900005</result>