A train departs from City A to City B at 6:00 am, plans to travel 100 kilometers per hour, and arrives at City B at 6:00 pm. But the actual arrival time is 4 pm, 2 hours earlier, how many kilometers does the train actually travel per hour? how many kilometers
一列火车早上6时从甲城开往乙城，计划每小时行驶100千米，下午6时到达乙城．但实际到达时间是下午4时，提前2小时，问火车实际每小时行驶多少千米？多少千米
<gadget id="calculator">18 - 6</gadget>
<output>12</output>

<gadget id="calculator">16 - 6</gadget>
<output>10</output>

<gadget id="calculator">12 / 10</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">100 * (6/5)</gadget>
<output>120</output>

<result>120</result>