Alright, let's work through 8556429 times 18173067 step by step
8556429 × 18173067 = 18173067 × (8556429)
+ 18173067 × 9 resulting in 163557603
+ 18173067 × 20 yielding 363461340
+ 18173067 × 400 giving us 7269226800
+ 18173067 × 6000 resulting in 109038402000
+ 18173067 × 50000 yielding 908653350000
+ 18173067 × 500000 producing 9086533500000
+ 18173067 × 8000000 what gives us 145384536000000

= 155496557497743
