Alright, let's work through 8404 times 8431 step by step
8404 × 8431 = 8431 × (8404)
+ 8431 × 4 resulting in 33724
+ 8431 × 00 producing 0
+ 8431 × 400 that results in 3372400
+ 8431 × 8000 yielding 67448000

= 70854124
