Let's calculate 9889 x 3451
9889 × 3451 = 3451 × (9889)
+ 3451 × 9 that is equal 31059
+ 3451 × 80 that is equal 276080
+ 3451 × 800 which equals 2760800
+ 3451 × 9000 what gives us 31059000

= 34126939
