A person walks 4 kilometers per hour, a car travels 10.8 times faster than a human walk per hour, and a train travels 2.5 times faster than a car per hour. How many miles does the train travel per hour?
人步行每小时行4千米，汽车每小时的速度是人步行的10.8倍，火车每小时的速度是汽车的2.5倍．火车每小时行驶多少千米？
<gadget id="calculator">4 * 10.8 * 2.5</gadget>
<output>108</output>

<result>108</result>