No problem, we've got 4321 and 9989 to multiply
4321 × 9989 = 9989 × (4321)
+ 9989 × 1 which equals 9989
+ 9989 × 20 yielding 199780
+ 9989 × 300 that is equal 2996700
+ 9989 × 4000 that results in 39956000

= 43162469
