Alright, let's work through 9789 times 9989 step by step
9789 × 9989 = 9989 × (9789)
+ 9989 × 9 yielding 89901
+ 9989 × 80 what gives us 799120
+ 9989 × 700 that equals 6992300
+ 9989 × 9000 what gives us 89901000

= 97782321
