Alright, let's work through 3989 times 4214 step by step
3989 × 4214 = 4214 × (3989)
+ 4214 × 9 resulting in 37926
+ 4214 × 80 producing 337120
+ 4214 × 900 giving us 3792600
+ 4214 × 3000 that equals 12642000

= 16809646
