4/5=((())/(()))=(16/(()))=((())/25)=how much (decimal).
4/5=((())/(()))=(16/(()))=((())/25)=多少(小数)．
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>