Put 20 grams of sugar into 80 grams of water, how much sugar occupies the sugar water
把20克糖放入80克水中，糖占有糖水的多少
<gadget id="calculator">20 + 80</gadget>
<output>100</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>