Alright, let's work through 8436 times 1642 step by step
8436 × 1642 = 1642 × (8436)
+ 1642 × 6 resulting in 9852
+ 1642 × 30 what gives us 49260
+ 1642 × 400 producing 656800
+ 1642 × 8000 producing 13136000

= 13851912
