Answer :

To figure this out, we must multiply the highest 3 digit number and the highest 1 digit number together.

9 is the highest 1 digit number.
999 is the highest 3 digit number.

999 × 9 = 8991

The greatest possible product is 8,991.
AL2006
The greatest possible product is what you get when both numbers are
as big as they can be.

The greatest possible  3-digit number is  999 .

The greatest possible  1-digit number is  9 .

Their product is  (999 x 9) = 8,991 .