Xiaodong travels (4/5) kilometers in (1/5) hours, how many hours does it take him to travel 1 kilometer?
小东(1/5)小时行(4/5)千米，他行1千米需要多少小时．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

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

<gadget id="calculator">(1/5) / (4/5)</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>