The railway from Qingdao to Beijing is about 900 kilometers long, and the bullet train traveled the whole distance (1/4) in 2 hours. According to this calculation, how many hours does it take to travel from Qingdao to Beijing by bullet train?
青岛到北京的铁路长约900千米，动车2小时行驶了全程的(1/4)．照这样计算，乘坐动车从青岛到北京大约需要几小时？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">2 / (1/4)</gadget>
<output>8</output>

<result>8</result>