98,901
891 is the largest.
10
The number 9 is the greatest one-digit number.
9 x 9 = 81
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9 times the number
It can have up to 5 digits.
891 is the largest.
You will get the greatest product if you choose the greatest possible numbers in both cases, i.e., 9 x 99.
Since the greatest digit is 9 and the greatest 2-digit number is 99, the product of them is 891.
2 digit number
999900
It is 891.
3
1000
9999 is the 4-digit number and 999 is the 3-digit number.
Six.