Alright, let's work through 84178609 times 68532142 step by step
84178609 × 68532142 = 68532142 × (84178609)
+ 68532142 × 9 yielding 616789278
+ 68532142 × 00 that is equal 0
+ 68532142 × 600 that results in 41119285200
+ 68532142 × 8000 that is equal 548257136000
+ 68532142 × 70000 that results in 4797249940000
+ 68532142 × 100000 yielding 6853214200000
+ 68532142 × 4000000 resulting in 274128568000000
+ 68532142 × 80000000 giving us 5482571360000000

= 5768940385350478
