20% of 1 kilogram is as much as 2 kilograms.
1千克的20%和2千克的多少同样多．
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) / 2</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 * (1/10)</gadget>
<output>1/10 = around 0.1</output>

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