The road from Beijing to Tianjin is 120 kilometers long, and it takes 3 hours for a truck to travel. What is the speed of the truck in kilometers per hour?
北京到天津的公路长120千米，货车要行3小时，货车的速度是多少千米/时
<gadget id="calculator">120 / 3</gadget>
<output>40</output>

<result>40</result>