If 25 grams of sugar is dissolved in 100 grams of water, what is the concentration of sugar water?
25克糖溶入100克水中，糖水的浓度是多少．
<gadget id="calculator">25 + 100</gadget>
<output>125</output>

<gadget id="calculator">25 / 125</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>