Alright, let's work through 4180 times 3869 step by step
4180 × 3869 = 3869 × (4180)
+ 3869 × 0 giving us 0
+ 3869 × 80 that equals 309520
+ 3869 × 100 yielding 386900
+ 3869 × 4000 resulting in 15476000

= 16172420
