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

<result>2_500</result>