Alright, let's work through 840159 times 18082137 step by step
840159 × 18082137 = 18082137 × (840159)
+ 18082137 × 9 resulting in 162739233
+ 18082137 × 50 yielding 904106850
+ 18082137 × 100 resulting in 1808213700
+ 18082137 × 0000 producing 0
+ 18082137 × 40000 resulting in 723285480000
+ 18082137 × 800000 resulting in 14465709600000

= 15191870139783
