After the train speeds up, it travels an average of 112 kilometers per hour, and Xiaojun walks 28 kilometers in 7 hours. How many kilometers does the train travel more per hour than Xiaojun?
火车提速后平均每小时行驶112千米，小军7小时步行28千米．火车比小军每小时多行多少千米？
<gadget id="calculator">28 / 7</gadget>
<output>4</output>

<gadget id="calculator">112 - 4</gadget>
<output>108</output>

<result>108</result>