The distance between A and B is 120 kilometers. It takes a car 3 hours to drive from A to B and 2 hours to return. How many kilometers per hour does the car travel on average?
甲、乙两地相距120千米，一辆汽车从甲地开往乙地用了3小时，返回时用了2小时，这辆汽车往返平均每小时行多少千米？
<gadget id="calculator">120 * 2</gadget>
<output>240</output>

<gadget id="calculator">3 + 2</gadget>
<output>5</output>

<gadget id="calculator">240 / 5</gadget>
<output>48</output>

<result>48</result>