The distance between the east and the west is 24 kilometers. A person travels from the east to the west, and then immediately returns to the east. What is the average speed of his round trip in 8 hours?
东西两地相距24千米，某人从东地到西地，又立即回到东地，一共用了8小时他往返的平均速度是多少？
<gadget id="calculator">2 / 8</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">24 * (1/4)</gadget>
<output>6</output>

<result>6</result>