Grandpa Wang’s chicken farm raised 15 roosters and 75 hens, and laid a total of 450 eggs in 7 days. On average, how many eggs does each hen lay each week?
王爷爷家的养鸡场养了15只公鸡75只母鸡，7天一共下了450个鸡蛋平均每只鸡每个星期下几个蛋？
<gadget id="calculator">450 / 75</gadget>
<output>6</output>

<result>6</result>