Alright, let's work through 3678 times 4989 step by step
3678 × 4989 = 4989 × (3678)
+ 4989 × 8 that is equal 39912
+ 4989 × 70 that results in 349230
+ 4989 × 600 that is equal 2993400
+ 4989 × 3000 resulting in 14967000

= 18349542
