The distance between A and B is 36 kilometers. A car travels from A to B. It takes 6 hours to go there and 4 hours to return. What is the average speed of the car traveling between A and B in kilometers per hour?
甲、乙两地相距36千米，一辆汽车从甲地开往乙地，去时用了6小时，返回时用了4小时．这辆汽车往返甲、乙两地的平均速度是多少千米/时．
<gadget id="calculator">6 + 4</gadget>
<output>10</output>

<gadget id="calculator">2 / 10</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">36 * (1/5)</gadget>
<output>36/5 = around 7.2</output>

<result>36/5 = around 7.2</result>