Alright, let's work through 8413 times 6447 step by step
8413 × 6447 = 6447 × (8413)
+ 6447 × 3 producing 19341
+ 6447 × 10 that equals 64470
+ 6447 × 400 giving us 2578800
+ 6447 × 8000 that is equal 51576000

= 54238611
