Alright, let's work through 64789417 times 67275947 step by step
64789417 × 67275947 = 67275947 × (64789417)
+ 67275947 × 7 producing 470931629
+ 67275947 × 10 producing 672759470
+ 67275947 × 400 that results in 26910378800
+ 67275947 × 9000 that results in 605483523000
+ 67275947 × 80000 producing 5382075760000
+ 67275947 × 700000 giving us 47093162900000
+ 67275947 × 4000000 that is equal 269103788000000
+ 67275947 × 60000000 resulting in 4036556820000000

= 4358769384252899
