To prepare a kind of sugar water, the mass ratio of sugar and water is 1:7, and the sugar is the amount of sugar water.
要配制一种糖水，糖和水的质量比是1：7，糖是糖水的多少．
<gadget id="calculator">1 + 7</gadget>
<output>8</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<result>1/8 = around 0.125</result>