Alright, let's work through 6436 times 9865 step by step
6436 × 9865 = 9865 × (6436)
+ 9865 × 6 resulting in 59190
+ 9865 × 30 that results in 295950
+ 9865 × 400 yielding 3946000
+ 9865 × 6000 producing 59190000

= 63491140
