Alright, let's work through 8004 times 3981 step by step
8004 × 3981 = 3981 × (8004)
+ 3981 × 4 what gives us 15924
+ 3981 × 00 producing 0
+ 3981 × 000 that is equal 0
+ 3981 × 8000 that results in 31848000

= 31863924
