Alright, let's work through 8421687 times 22978904 step by step
8421687 × 22978904 = 22978904 × (8421687)
+ 22978904 × 7 producing 160852328
+ 22978904 × 80 resulting in 1838312320
+ 22978904 × 600 producing 13787342400
+ 22978904 × 1000 resulting in 22978904000
+ 22978904 × 20000 giving us 459578080000
+ 22978904 × 400000 what gives us 9191561600000
+ 22978904 × 8000000 yielding 183831232000000

= 193521137091048
