Alright, let's work through 6407994 times 96238371 step by step
6407994 × 96238371 = 96238371 × (6407994)
+ 96238371 × 4 what gives us 384953484
+ 96238371 × 90 which equals 8661453390
+ 96238371 × 900 yielding 86614533900
+ 96238371 × 7000 yielding 673668597000
+ 96238371 × 00000 that results in 0
+ 96238371 × 400000 that results in 38495348400000
+ 96238371 × 6000000 yielding 577430226000000

= 616694903937774
