24 cows can produce 600 kg of milk a day. Xiaolan's family raises 13 cows like this, how many kilograms of milk can they produce a day?
24头奶牛一天可以产600千克牛奶．小兰家养了这样的13头牛，一天可以产多少千克牛奶？
<gadget id="calculator">600 / 24</gadget>
<output>25</output>

<gadget id="calculator">25 * 13</gadget>
<output>325</output>

<result>325</result>