Alright, let's work through 80591798 times 104543 step by step
80591798 × 104543 = 104543 × (80591798)
+ 104543 × 8 yielding 836344
+ 104543 × 90 that is equal 9408870
+ 104543 × 700 that equals 73180100
+ 104543 × 1000 producing 104543000
+ 104543 × 90000 what gives us 9408870000
+ 104543 × 500000 that is equal 52271500000
+ 104543 × 0000000 yielding 0
+ 104543 × 80000000 producing 8363440000000

= 8425308338314
