Alright, let's work through 3348 times 4378 step by step
3348 × 4378 = 4378 × (3348)
+ 4378 × 8 resulting in 35024
+ 4378 × 40 yielding 175120
+ 4378 × 300 what gives us 1313400
+ 4378 × 3000 what gives us 13134000

= 14657544
