Use the numbers 1, 2, 3, 4, 5, 6, 7, 8, and 9 to form two numbers (each number can only be used once), so that one of the numbers is 3 times the other number, then the two numbers What is the smaller number in .
用数字1、2、3、4、5、6、7、8、9组成两个数(每个数字只能用一次)，使其中一个数是另一个数的3倍，那么这两个数中较小的数是多少．
<result>12</result>