Alright, let's work through 84109435 times 405829 step by step
84109435 × 405829 = 405829 × (84109435)
+ 405829 × 5 giving us 2029145
+ 405829 × 30 yielding 12174870
+ 405829 × 400 producing 162331600
+ 405829 × 9000 that results in 3652461000
+ 405829 × 00000 producing 0
+ 405829 × 100000 what gives us 40582900000
+ 405829 × 4000000 that results in 1623316000000
+ 405829 × 80000000 giving us 32466320000000

= 34134047896615
