Wang Fei traveled 240 kilometers at a speed of 40 kilometers per hour, and traveled 60 kilometers per hour when returning by the same route. What is the average speed of Wang Fei's round trip in kilometers per hour?
王飞以每小时40千米的速度行了240千米，按原路返回时每小时行60千米，王飞往返的平均速度是每小时行多少千米．
<gadget id="calculator">240 / 40</gadget>
<output>6</output>

<gadget id="calculator">240 / 60</gadget>
<output>4</output>

<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">240 * (1/5)</gadget>
<output>48</output>

<result>48</result>