(4/5)○8=(4/5)*(1/8)=how much.
(4/5)○8=(4/5)*(1/8)=多少．
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(4/5) / 8</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>