Alright, let's work through 3878 times 4939 step by step
3878 × 4939 = 4939 × (3878)
+ 4939 × 8 giving us 39512
+ 4939 × 70 resulting in 345730
+ 4939 × 800 yielding 3951200
+ 4939 × 3000 giving us 14817000

= 19153442
