The weight of a pig is equal to the weight of 4 sheep, the weight of a sheep is equal to the weight of 6 chickens, and the weight of a chicken is 3 kg. How much does a pig weigh?
一头猪的重量等于4只羊的重量，1只羊的重量等于6只鸡的重量，1只鸡重3千克，一头猪重多少千克？
<gadget id="calculator">3 * 6 * 4</gadget>
<output>72</output>

<result>72</result>