Alright, let's work through 13423459 times 78269834 step by step
13423459 × 78269834 = 78269834 × (13423459)
+ 78269834 × 9 giving us 704428506
+ 78269834 × 50 what gives us 3913491700
+ 78269834 × 400 resulting in 31307933600
+ 78269834 × 3000 which equals 234809502000
+ 78269834 × 20000 which equals 1565396680000
+ 78269834 × 400000 which equals 31307933600000
+ 78269834 × 3000000 that is equal 234809502000000
+ 78269834 × 10000000 yielding 782698340000000

= 1050651907635806
