Put 20 grams of sugar into 80% of the water, what percentage of the sugar water is the water?
把20克糖放入80水中，水占糖水的几分之几？
<gadget id="calculator">20 + 80</gadget>
<output>100</output>

<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

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