There is a four-digit number, its thousand digit is 6, its hundreds digit is 1, and its tens digit is 4. If this number is a multiple of 2 and has a factor of 3, then what should be the ones digit of this number.
有一个四位数，它的千位上是6，百位上是1，十位上是4，如果这个数既是2的倍数，又有因数3，那么这个数的个位应该是多少．
<result>6_144</result>