40 cows produce 12,000 kilograms of milk in 30 days, how many kilograms of milk does each cow produce on average per day?
40头奶牛30天产奶12000千克，平均每头奶牛每天产奶多少千克？
<gadget id="calculator">12_000 / 40 / 30</gadget>
<output>10</output>

<result>10</result>