Alright, let's work through 3337 times 1878 step by step
3337 × 1878 = 1878 × (3337)
+ 1878 × 7 yielding 13146
+ 1878 × 30 that results in 56340
+ 1878 × 300 resulting in 563400
+ 1878 × 3000 what gives us 5634000

= 6266886
