Alright, let's work through 80998814 times 51363315 step by step
80998814 × 51363315 = 51363315 × (80998814)
+ 51363315 × 4 that is equal 205453260
+ 51363315 × 10 that is equal 513633150
+ 51363315 × 800 producing 41090652000
+ 51363315 × 8000 which equals 410906520000
+ 51363315 × 90000 yielding 4622698350000
+ 51363315 × 900000 that results in 46226983500000
+ 51363315 × 0000000 giving us 0
+ 51363315 × 80000000 yielding 4109065200000000

= 4160367598108410
