Use the six numbers 2, 3, 4, 5, 6, and 7 to form two three-digit numbers A and B, then what is the greatest possible common divisor of the three numbers A, B, and 540?
用2、3、4、5、6、7这六个数码组成两个三位数A和B，那么A、B、540这三个数的最大公约数最大可能是多少．
<gadget id="calculator">2 * 2 * 3 * 3 * 3</gadget>
<output>108</output>

<result>108</result>