A sugar water is prepared by mixing sugar and water in a ratio of 1:30. How much sugar accounts for the sugar water.
一种糖水由糖和水按1：30的比例配制成的．其中糖占糖水的多少．
<gadget id="calculator">1 + 30</gadget>
<output>31</output>

<gadget id="calculator">1 / 31</gadget>
<output>1/31 = around 0.032258</output>

<result>1/31 = around 0.032258</result>