If 20 grams of sugar is completely dissolved in 80 grams of water, what is the sugar content of the sugar water?
20克糖完全溶解在80克水中，则该糖水的含糖率为多少．
<gadget id="calculator">20 + 80</gadget>
<output>100</output>

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

<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<gadget id="calculator">(1/5) * 1</gadget>
<output>1/5 = around 0.2</output>

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