If 2 puppies weigh as much as 6 geese, and 1 dog weighs as much as 12 chickens, then one goose weighs as many chickens.
2只小狗与6只鹅一样重，1只狗与12只鸡一样重，那么一只鹅与多少鸡一样重．
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">12 / 3</gadget>
<output>4</output>

<result>4</result>