The mass ratio of sugar to sugar water is 3:10, so how much sugar accounts for water
糖与糖水的质量比是3：10，则糖占水的多少
<gadget id="calculator">10 - 3</gadget>
<output>7</output>

<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<result>3/7 = around 0.428571</result>