Since 1997, my country's railways have carried out a large-scale speed increase. A train speeds up by 40% and reaches 112 kilometers per hour. How many kilometers per hour did the train travel?
1997年至今，我国铁路进行了大规模提速．有一列火车提速40%后速度达到了每时112千米，这列火车原来每时行驶多少千米？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 + (2/5)</gadget>
<output>7/5 = around 1.4</output>

<gadget id="calculator">112 / (7/5)</gadget>
<output>80</output>

<result>80</result>