Alright, let's work through 3839 times 4139 step by step
3839 × 4139 = 4139 × (3839)
+ 4139 × 9 that equals 37251
+ 4139 × 30 that is equal 124170
+ 4139 × 800 resulting in 3311200
+ 4139 × 3000 what gives us 12417000

= 15889621
