The milk production of the three cows raised by Zhang Yan last week was 220.5 kg. How much milk does each cow produce per day?
张燕家养的3头奶牛上周的产奶量是220.5千克，每头奶牛一天产奶多少千克？
<gadget id="calculator">220.5 / 7 / 3</gadget>
<output>10.5</output>

<result>10.5</result>