After Uncle Wang brought 600 yuan to buy 5 ducklings in the market, there is 100 yuan left. How much is each duckling on average?
王叔叔带了600元钱在市场买了5只小鸭后，还剩下100元，平均每只小鸭多少钱？
<gadget id="calculator">600 - 100</gadget>
<output>500</output>

<gadget id="calculator">500 / 5</gadget>
<output>100</output>

<result>100</result>