A 4-digit number with different digits is divisible by 9. After removing its ones digit, a 3-digit number is left. This 3-digit number is divisible by 4. What is the largest 4-digit number?
一个各位数字互不相同的四位数能被9整除，把它的个位数字去掉后剩下一个三位数，这个三位数能被4整除，这个四位数最大是多少？
<result>9_846</result>