The Shanghai-Tianjin railway is 1,375 kilometers long. A train is going from Shanghai to Tianjin. When it has traveled (3/5) of the total distance, it is notified that the train speeds up to 110 kilometers per hour. How many hours will it take to reach Tianjin?
上海至天津铁路长1375千米．一列火车从上海开往天津，当行了总路程的(3/5)时，接到通知要求火车提速到每小时行110千米，再经过多少小时到达天津？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/5) / 110</gadget>
<output>1/275 = around 0.003636</output>

<gadget id="calculator">1_375 * (1/275)</gadget>
<output>5</output>

<result>5</result>