Question

The greatest product of a 3 digit number and a 1 digit number is 8,891. is it correct?

Answer 1

the biggest 3 digit number is 999 since 9 is highest single digit number
highest singel digit numbe ris 9 so
9 times 999=8991
so you are incorrect unless you made a typo

Answer 2

no, 9 is the biggest single digit number and 999 is the biggest 3 digit number. 9x999 is 8991