A train travels 180 kilometers per hour after speeding up, which is 12 kilometers more than twice the original speed. How many kilometers per hour did the train travel?
一列火车提速后每小时行180千米，比原来的2倍多12千米，原来这列火车每小时行多少千米？
<gadget id="calculator">180 - 12</gadget>
<output>168</output>

<gadget id="calculator">168 / 2</gadget>
<output>84</output>

<result>84</result>