Alright, let's work through 83999509 times 40517045 step by step
83999509 × 40517045 = 40517045 × (83999509)
+ 40517045 × 9 what gives us 364653405
+ 40517045 × 00 that is equal 0
+ 40517045 × 500 that results in 20258522500
+ 40517045 × 9000 resulting in 364653405000
+ 40517045 × 90000 that equals 3646534050000
+ 40517045 × 900000 resulting in 36465340500000
+ 40517045 × 3000000 which equals 121551135000000
+ 40517045 × 80000000 that results in 3241363600000000

= 3403411886130905
