Alright, let's work through 3690 times 4006 step by step
3690 × 4006 = 4006 × (3690)
+ 4006 × 0 that is equal 0
+ 4006 × 90 producing 360540
+ 4006 × 600 yielding 2403600
+ 4006 × 3000 resulting in 12018000

= 14782140
