There are 3,000 chickens in the chicken farm, and the number of roosters is 1/5 that of hens. How many roosters are there?
养鸡场共有鸡3000只，公鸡的只数是母鸡的(1/5)，公鸡有多少只？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">3_000 / (6/5)</gadget>
<output>2_500</output>

<gadget id="calculator">3_000 - 2_500</gadget>
<output>500</output>

<result>500</result>