My family has 6 rabbits, 2 of which are black rabbits and 4 are white rabbits. Each white rabbit gave birth to 3 little rabbits. How many rabbits are there in the family now?
我家养了6只兔子，其中有2只是黑兔，4只是白兔．每只白兔又生了3只小兔，家现在一共有多少只兔子．
<gadget id="calculator">3 * 4</gadget>
<output>12</output>

<gadget id="calculator">6 + 12</gadget>
<output>18</output>

<result>18</result>