Alright, let's work through 8404161 times 64886973 step by step
8404161 × 64886973 = 64886973 × (8404161)
+ 64886973 × 1 yielding 64886973
+ 64886973 × 60 that equals 3893218380
+ 64886973 × 100 yielding 6488697300
+ 64886973 × 4000 that is equal 259547892000
+ 64886973 × 00000 giving us 0
+ 64886973 × 400000 that results in 25954789200000
+ 64886973 × 8000000 that equals 519095784000000

= 545320567894653
