Alright, let's work through 3689 times 8001 step by step
3689 × 8001 = 8001 × (3689)
+ 8001 × 9 what gives us 72009
+ 8001 × 80 that results in 640080
+ 8001 × 600 that results in 4800600
+ 8001 × 3000 yielding 24003000

= 29515689
