On Saturday, Teacher Li's family went to the forest park by bicycle at a speed of 240 m/min for a total of 40 minutes. The time-returning speed is 200 m/min, how many minutes has it been going this time?
星期六，李老师一家乘自行车去森林公园玩，去时速度为240米/分，共行40分钟．返时速度为200米/分，这回行了多少分钟？
<gadget id="calculator">40 / 200</gadget>
<output>1/5 = around 0.2</output>

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

<result>48</result>