Wang Yan's grandma raised 2 roosters and 4 hens at home, with 28 symbiotic eggs. How many eggs did each hen lay on average?
王妍的奶奶家养了2只公鸡、4只母鸡，共生蛋28个问平均每只鸡生了几个蛋？
<gadget id="calculator">28 / 4</gadget>
<output>7</output>

<result>7</result>