A car travels 320 kilometers in 4 hours, and a train travels 360 kilometers in 3 hours. Which car runs fast, how many kilometers per hour?
汽车4小时行320千米，火车3小时行360千米．哪种车跑得快，每小时快多少千米？
<gadget id="calculator">360 / 3</gadget>
<output>120</output>

<gadget id="calculator">320 / 4</gadget>
<output>80</output>

<gadget id="calculator">120 - 80</gadget>
<output>40</output>

<result>40</result>