Put 30 grams of sugar in 90 grams of water, how much sugar accounts for the sugar water.
把30克糖放在90克水中，糖占糖水的多少．
<gadget id="calculator">30 + 90</gadget>
<output>120</output>

<gadget id="calculator">30 / 120</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>