25 kilograms of rice, eat 20%, and eat the remaining 20%, how many kilograms are left.
25千克大米，吃了20%，又吃了余下的20%，还剩多少千克．
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">25 * (4/5) * (4/5)</gadget>
<output>16</output>

<result>16</result>