Alright, let's work through 3689 times 8712 step by step
3689 × 8712 = 8712 × (3689)
+ 8712 × 9 yielding 78408
+ 8712 × 80 that is equal 696960
+ 8712 × 600 resulting in 5227200
+ 8712 × 3000 yielding 26136000

= 32138568
