From point A to point B, it takes 5 hours for car A and 4 hours for car B. What is the speed of car A at the speed of car B?
从A地到B地，甲车要5小时，乙车要4小时，甲车速度是乙车的多少．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

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

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