Alright, let's work through 81423974 times 38305518 step by step
81423974 × 38305518 = 38305518 × (81423974)
+ 38305518 × 4 that results in 153222072
+ 38305518 × 70 that is equal 2681386260
+ 38305518 × 900 what gives us 34474966200
+ 38305518 × 3000 that equals 114916554000
+ 38305518 × 20000 that is equal 766110360000
+ 38305518 × 400000 which equals 15322207200000
+ 38305518 × 1000000 resulting in 38305518000000
+ 38305518 × 80000000 producing 3064441440000000

= 3118987501688532
