Two numbers A and B have both a common factor of 2 and a common factor of 3. Which of the following numbers is the greatest common factor of these two numbers
甲、乙两个数既有公因数2，又有公因数3．下面哪个数可能是这两个数的最大公因数多少
<gadget id="calculator">2 * 2 * 3</gadget>
<output>12</output>

<result>12</result>