(1/5) of boys is equal to 25% of girls, how many girls are boys, boys are more than girls ((())/(())).
男生的(1/5)等于女生的25%，女生是男生的多少，男生比女生多((())/(()))．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

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

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