Alright, let's work through 8321 times 6407 step by step
8321 × 6407 = 6407 × (8321)
+ 6407 × 1 giving us 6407
+ 6407 × 20 what gives us 128140
+ 6407 × 300 producing 1922100
+ 6407 × 8000 giving us 51256000

= 53312647
