9 cows in the farm can milk 945 kg of milk in a week. How many kilograms of milk are averagely milked per cow per day?
饲养场9头奶牛一周可挤牛奶945千克．平均每头奶牛每天挤奶多少千克？
<gadget id="calculator">945 / 7 / 9</gadget>
<output>15</output>

<result>15</result>