From A to B, the small car takes 4 hours and the big car takes 5 hours. What is the speed of the big car compared to the small car?
从甲地到乙地，小汽车用了4小时，大汽车用了5小时，大汽车的速度是小汽车的多少
<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>