There are 3,000 roosters in a chicken farm, 20% more than hens. How many hens are there?
养鸡场有公鸡3000只，比母鸡多20%，有母鸡多少只？
<gadget id="calculator">20 / 100</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>