The ratio of a ratio is 0.8. If the former term remains unchanged and the latter term is reduced (1/4), what is the ratio.
一个比的比值是0.8，如果前项不变，后项缩小(1/4)，比值是多少．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

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

<gadget id="calculator">4 / (5/4)</gadget>
<output>16/5 = around 3.2</output>

<result>16/5 = around 3.2</result>