The ratio of chickens to ducks in Uncle Wang's family is 8:5. It is known that there are 400 chickens in his family. How many more chickens than ducks in Uncle Wang's family?
王叔叔家养鸡和鸭的只数比是8：5，已知他们家养鸡400只，王叔叔家养的鸡比鸭多多少只？
<gadget id="calculator">400 / 8</gadget>
<output>50</output>

<gadget id="calculator">8 - 5</gadget>
<output>3</output>

<gadget id="calculator">50 * 3</gadget>
<output>150</output>

<result>150</result>