Some confusion as to whether it is "I" or "you".
The number in question is 8642
9,999,876 is the greatest seven-digit number using four different digits.
99987
1324
greatest number9999987
3201
9999876
9,999,876 is the greatest seven-digit number using four different digits.
99987
1324
greatest number9999987
3201
The greatest six-digit number is 199,999.
9,876,543 is.
98
987654
Since the greatest digit is 9 and the greatest 2-digit number is 99, the product of them is 891.
The number 9 is the greatest one-digit number.