(1/4)*(1/5)=how much.
(1/4)*(1/5)=多少．
<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>1/20 = around 0.05</output>

<result>1/20 = around 0.05</result>