Alright, let's work through 6371 times 1989 step by step
6371 × 1989 = 1989 × (6371)
+ 1989 × 1 giving us 1989
+ 1989 × 70 which equals 139230
+ 1989 × 300 which equals 596700
+ 1989 × 6000 that equals 11934000

= 12671919
