50 kilograms of flour, eat 20% and increase by 20%, how many kilograms of flour are there now?
50千克面粉，吃掉20%后又增加20%，现在有面粉多少千克．
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">50 * (1/5)</gadget>
<output>10</output>

<gadget id="calculator">50 - 10</gadget>
<output>40</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">40 * (6/5)</gadget>
<output>48</output>

<result>48</result>