Uncle Wang has 7 chickens, including 2 roosters, and 5 times as many ducks as hens. How many ducks does Uncle Wang have?
王伯伯养了7只鸡，其中有2只公鸡，养的鸭的只数是母鸡的5倍，王伯伯养了多少只鸭？
<gadget id="calculator">7 - 2</gadget>
<output>5</output>

<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<result>25</result>