The weight of a pig is equivalent to the weight of 2 sheep, the weight of a cow is equivalent to the weight of 3 pigs, and the weight of that cow is equivalent to the weight of how many sheep.
一头猪的重量相当于2只羊的重量，一头牛的重量相当于3头猪的重量，那一头牛的重量相当于多少只羊的重量．
<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<result>6</result>