Alright, let's work through 83929439 times 17371517 step by step
83929439 × 17371517 = 17371517 × (83929439)
+ 17371517 × 9 that equals 156343653
+ 17371517 × 30 what gives us 521145510
+ 17371517 × 400 giving us 6948606800
+ 17371517 × 9000 giving us 156343653000
+ 17371517 × 20000 resulting in 347430340000
+ 17371517 × 900000 resulting in 15634365300000
+ 17371517 × 3000000 yielding 52114551000000
+ 17371517 × 80000000 producing 1389721360000000

= 1457981676388963
