Alright, let's work through 8340381 times 50045833 step by step
8340381 × 50045833 = 50045833 × (8340381)
+ 50045833 × 1 which equals 50045833
+ 50045833 × 80 producing 4003666640
+ 50045833 × 300 producing 15013749900
+ 50045833 × 0000 that results in 0
+ 50045833 × 40000 yielding 2001833320000
+ 50045833 × 300000 yielding 15013749900000
+ 50045833 × 8000000 what gives us 400366664000000

= 417401314682373
