Alright, let's work through 3687 times 4889 step by step
3687 × 4889 = 4889 × (3687)
+ 4889 × 7 yielding 34223
+ 4889 × 80 resulting in 391120
+ 4889 × 600 which equals 2933400
+ 4889 × 3000 producing 14667000

= 18025743
