Alright, let's work through 3978 times 4149 step by step
3978 × 4149 = 4149 × (3978)
+ 4149 × 8 that results in 33192
+ 4149 × 70 that results in 290430
+ 4149 × 900 what gives us 3734100
+ 4149 × 3000 resulting in 12447000

= 16504722
