Teacher Ma goes from home to school, travels (1/20) kilometers per minute, and can arrive in 24 minutes; if he travels (3/50) kilometers per minute, do you know how many minutes he can reach?
马老师从家去学校，每分钟行(1/20)千米，24分钟可以到达；如果他每分钟行(3/50)千米，你知道他多少分钟可以到达吗？
<gadget id="calculator">1 / 20</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">3 / 50</gadget>
<output>3/50 = around 0.06</output>

<gadget id="calculator">24 / (3/50)</gadget>
<output>400</output>

<gadget id="calculator">(1/20) * 400</gadget>
<output>20</output>

<result>20</result>