Xiao Ming can buy 6 fish with the price of 2 chickens, 10 same books with the price of 3 fish, and how many chickens can he buy with the price of 30 books.
小明买2只鸡的钱可以买6条鱼，买3条鱼的钱可买10本一样的书，买30本书的钱可以买多少只鸡．
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<result>3</result>