Put 50 grams of salt in 400 grams of water, what is the percentage of water in the salt water
把50克盐放人400克水中，水占盐水的多少
<gadget id="calculator">50 + 400</gadget>
<output>450</output>

<gadget id="calculator">400 / 450</gadget>
<output>8/9 = around 0.888889</output>

<result>8/9 = around 0.888889</result>