Alright, let's work through 1669 times 8286 step by step
1669 × 8286 = 8286 × (1669)
+ 8286 × 9 yielding 74574
+ 8286 × 60 producing 497160
+ 8286 × 600 that is equal 4971600
+ 8286 × 1000 resulting in 8286000

= 13829334
