From A to B, A car takes 4 hours and B takes 5 hours. The speed of car A is that of car B ((())/(())).
从甲地到乙地，甲车要用4小时，乙车要用5小时．甲车的速度是乙车的((())/(()))．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/4) / (1/5)</gadget>
<output>5/4 = around 1.25</output>

<result>5/4 = around 1.25</result>