4 cows in a farm can milk 1500 kg of milk in 25 days, how many kg of milk can each cow produce per day on average?
饲养场的4头奶牛25天可以挤牛奶1500千克，平均每头奶牛每天可以产牛奶多少千克？
<gadget id="calculator">1_500 / 25 / 4</gadget>
<output>15</output>

<result>15</result>