Alright, let's work through 6667 times 1989 step by step
6667 × 1989 = 1989 × (6667)
+ 1989 × 7 that is equal 13923
+ 1989 × 60 producing 119340
+ 1989 × 600 producing 1193400
+ 1989 × 6000 producing 11934000

= 13260663
