Alright, let's work through 64485376 times 91250446 step by step
64485376 × 91250446 = 91250446 × (64485376)
+ 91250446 × 6 producing 547502676
+ 91250446 × 70 that results in 6387531220
+ 91250446 × 300 yielding 27375133800
+ 91250446 × 5000 giving us 456252230000
+ 91250446 × 80000 resulting in 7300035680000
+ 91250446 × 400000 what gives us 36500178400000
+ 91250446 × 4000000 that results in 365001784000000
+ 91250446 × 60000000 producing 5475026760000000

= 5884319320477696
