A bottle of sugar water is a gram. If sugar accounts for 30% of the sugar water, what is the weight of the water in grams?
一瓶糖水中a克，如果糖占糖水的30%，则水重是多少克．
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 - (3/10)</gadget>
<output>7/10 = around 0.7</output>

<result>7/10 = around 0.7</result>