A farm raises 2,000 chickens, and there are fewer ducks than chickens (1/4). How many ducks do you have?
一个饲养场养鸡2000只，养的鸭比鸡少(1/4)．养鸭多少只？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">2_000 * (3/4)</gadget>
<output>1_500</output>

<result>1_500</result>