Alright, let's work through 18090640 times 42127756 step by step
18090640 × 42127756 = 42127756 × (18090640)
+ 42127756 × 0 what gives us 0
+ 42127756 × 40 that results in 1685110240
+ 42127756 × 600 that results in 25276653600
+ 42127756 × 0000 yielding 0
+ 42127756 × 90000 resulting in 3791498040000
+ 42127756 × 000000 giving us 0
+ 42127756 × 8000000 producing 337022048000000
+ 42127756 × 10000000 what gives us 421277560000000

= 762118067803840
