(1/8)*(2/5)=how much.
(1/8)*(2/5)=多少．
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(1/8) * (2/5)</gadget>
<output>1/20 = around 0.05</output>

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