We're going to solve 4165 multiplied by 3909
4165 × 3909 = 3909 × (4165)
+ 3909 × 5 which equals 19545
+ 3909 × 60 yielding 234540
+ 3909 × 100 that equals 390900
+ 3909 × 4000 resulting in 15636000

= 16280985
