20% of 60 kg is equal to ((())/(())) of 40 kg.
60千克的20%与40千克的((())/(()))相等．
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) / 40</gadget>
<output>1/200 = around 0.005</output>

<gadget id="calculator">60 * (1/200)</gadget>
<output>3/10 = around 0.3</output>

<result>3/10 = around 0.3</result>