The speed of the train departing from Shanghai Hongqiao has been increased by 160 km/h from the original 120 km/h. How many hours will it take to travel the original 7-hour journey?
上海虹桥出发的列车的速度从原来120千米/小时提高了160千米/小时，原来行7小时的路程，现在要行多少小时？
<gadget id="calculator">7 / 160</gadget>
<output>7/160 = around 0.04375</output>

<gadget id="calculator">120 * (7/160)</gadget>
<output>21/4 = around 5.25</output>

<result>21/4 = around 5.25</result>