20 cows can produce 600 kg of milk in 10 days, how much milk can an average cow produce per day?
20只奶牛10天可产奶600千克，平均1只奶牛一天可产奶多少千克？
<gadget id="calculator">600 / 20 / 10</gadget>
<output>3</output>

<result>3</result>