Alright, let's work through 3623 times 6243 step by step
3623 × 6243 = 6243 × (3623)
+ 6243 × 3 yielding 18729
+ 6243 × 20 producing 124860
+ 6243 × 600 which equals 3745800
+ 6243 × 3000 that is equal 18729000

= 22618389
