Alright, let's work through 81626884 times 41894671 step by step
81626884 × 41894671 = 41894671 × (81626884)
+ 41894671 × 4 that equals 167578684
+ 41894671 × 80 yielding 3351573680
+ 41894671 × 800 what gives us 33515736800
+ 41894671 × 6000 which equals 251368026000
+ 41894671 × 20000 which equals 837893420000
+ 41894671 × 600000 which equals 25136802600000
+ 41894671 × 1000000 producing 41894671000000
+ 41894671 × 80000000 what gives us 3351573680000000

= 3419731449935164
