Alright, let's work through 81391162 times 55479452 step by step
81391162 × 55479452 = 55479452 × (81391162)
+ 55479452 × 2 that is equal 110958904
+ 55479452 × 60 yielding 3328767120
+ 55479452 × 100 resulting in 5547945200
+ 55479452 × 1000 which equals 55479452000
+ 55479452 × 90000 resulting in 4993150680000
+ 55479452 × 300000 that is equal 16643835600000
+ 55479452 × 1000000 which equals 55479452000000
+ 55479452 × 80000000 which equals 4438356160000000

= 4515537065403224
