A certain distance, A takes 20 minutes to complete the journey, and B takes 25 minutes to complete the journey, what is the speed of B at the speed of A
一段路，甲走完全程需20分钟，乙走完全程需25分钟，乙的速度是甲的速度的多少
<gadget id="calculator">1 / 25</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">1 / 20</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">(1/25) / (1/20)</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>