Alright, let's work through 3624 times 3921 step by step
3624 × 3921 = 3921 × (3624)
+ 3921 × 4 what gives us 15684
+ 3921 × 20 that results in 78420
+ 3921 × 600 producing 2352600
+ 3921 × 3000 yielding 11763000

= 14209704
