Alright, let's work through 63794215 times 85880345 step by step
63794215 × 85880345 = 85880345 × (63794215)
+ 85880345 × 5 that is equal 429401725
+ 85880345 × 10 producing 858803450
+ 85880345 × 200 that is equal 17176069000
+ 85880345 × 4000 yielding 343521380000
+ 85880345 × 90000 yielding 7729231050000
+ 85880345 × 700000 yielding 60116241500000
+ 85880345 × 3000000 that is equal 257641035000000
+ 85880345 × 60000000 which equals 5152820700000000

= 5478669193204175
