Aunt Liu raised 140 chickens, and the number of ducks was three times that of chickens. How many chickens and ducks did Aunt Liu raise?
刘阿姨养鸡140只，养鸭的只数是养鸡的3倍，刘阿姨养鸡、鸭共有多少只？
<gadget id="calculator">140 * 3</gadget>
<output>420</output>

<gadget id="calculator">420 + 140</gadget>
<output>560</output>

<result>560</result>