Alright, let's work through 3867 times 3109 step by step
3867 × 3109 = 3109 × (3867)
+ 3109 × 7 resulting in 21763
+ 3109 × 60 producing 186540
+ 3109 × 800 producing 2487200
+ 3109 × 3000 giving us 9327000

= 12022503
