There are 35 roosters, 65 hens, and 25 times as many ducks as chickens. How many ducks are there?
公鸡有35只，母鸡有65只，鸭的只数是鸡只数的25倍，鸭有多少只？
<gadget id="calculator">35 + 65</gadget>
<output>100</output>

<gadget id="calculator">100 * 25</gadget>
<output>2_500</output>

<result>2_500</result>