If the former term of the ratio is enlarged by 3 times and the latter term is reduced (1/4), what is the ratio?
比的前项扩大3倍，后项缩小(1/4)，那么比值多少．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">3 * (1/4)</gadget>
<output>3/4 = around 0.75</output>

<result>3/4 = around 0.75</result>