Alright, let's work through 80891342 times 8474759 step by step
80891342 × 8474759 = 8474759 × (80891342)
+ 8474759 × 2 that equals 16949518
+ 8474759 × 40 that is equal 338990360
+ 8474759 × 300 that results in 2542427700
+ 8474759 × 1000 that results in 8474759000
+ 8474759 × 90000 that is equal 762728310000
+ 8474759 × 800000 that equals 6779807200000
+ 8474759 × 0000000 yielding 0
+ 8474759 × 80000000 that results in 677980720000000

= 685534628636578
