Xiaohong goes from A to B to do business. She walks 40 meters per minute when she goes there, and 60 meters per minute when she returns. What is the average speed of Xiaohong’s round trip in meters per minute?
小红从甲地到乙地办事，去时每分钟走40米，返回时每分钟走60米，小红往返的平均速度是每分钟走多少米
<gadget id="calculator">1 * 2</gadget>
<output>2</output>

<gadget id="calculator">1 / 40</gadget>
<output>1/40 = around 0.025</output>

<gadget id="calculator">1 / 60</gadget>
<output>1/60 = around 0.016667</output>

<gadget id="calculator">(1/40) + (1/60)</gadget>
<output>1/24 = around 0.041667</output>

<gadget id="calculator">2 / (1/24)</gadget>
<output>48</output>

<result>48</result>