A chicken, a duck, a goose, and a dog each weigh 28 kilograms. The chicken weighs the same as the duck, the goose weighs three times that of the duck, and the dog weighs three times that of the goose. How many kilograms does the goose weigh?
鸡、鸭、鹅、狗各一只，一共重28千克，鸡和鸭一样重，鹅重是鸭的3倍，狗重是鹅的3倍，鹅重多少千克
<gadget id="calculator">1 + 1 + 3 + 9</gadget>
<output>14</output>

<gadget id="calculator">28 / 14</gadget>
<output>2</output>

<gadget id="calculator">2 * 3</gadget>
<output>6</output>

<result>6</result>