The distance between A and B is 360 kilometers. It takes a car 7 hours to drive from A to B, and 5 hours to return. What is the average round-trip speed of this car in meters per hour?
甲、乙两地相距360千米，一辆汽车从甲地开往乙地用了7小时，返回时用了5小时．这辆汽车往返的平均速度是每小时多少于米？
<gadget id="calculator">7 + 5</gadget>
<output>12</output>

<gadget id="calculator">2 / 12</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">360 * (1/6)</gadget>
<output>60</output>

<result>60</result>