Alright, let's work through 3688 times 8457 step by step
3688 × 8457 = 8457 × (3688)
+ 8457 × 8 what gives us 67656
+ 8457 × 80 producing 676560
+ 8457 × 600 that is equal 5074200
+ 8457 × 3000 producing 25371000

= 31189416
