Alright, let's work through 81138300 times 34597719 step by step
81138300 × 34597719 = 34597719 × (81138300)
+ 34597719 × 0 which equals 0
+ 34597719 × 00 which equals 0
+ 34597719 × 300 yielding 10379315700
+ 34597719 × 8000 that results in 276781752000
+ 34597719 × 30000 yielding 1037931570000
+ 34597719 × 100000 which equals 3459771900000
+ 34597719 × 1000000 what gives us 34597719000000
+ 34597719 × 80000000 which equals 2767817520000000

= 2807200103537700
