The mass ratio of sugar and water is 1:4, how much sugar accounts for sugar water
糖和水的质量比是1：4，糖占糖水的多少
<gadget id="calculator">1 + 4</gadget>
<output>5</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>