Alright, let's work through 4155 times 3804 step by step
4155 × 3804 = 3804 × (4155)
+ 3804 × 5 that results in 19020
+ 3804 × 50 producing 190200
+ 3804 × 100 that results in 380400
+ 3804 × 4000 resulting in 15216000

= 15805620
