No problem, we've got 80641823 and 67860478 to multiply
80641823 × 67860478 = 67860478 × (80641823)
+ 67860478 × 3 that results in 203581434
+ 67860478 × 20 producing 1357209560
+ 67860478 × 800 that is equal 54288382400
+ 67860478 × 1000 which equals 67860478000
+ 67860478 × 40000 yielding 2714419120000
+ 67860478 × 600000 giving us 40716286800000
+ 67860478 × 0000000 resulting in 0
+ 67860478 × 80000000 that results in 5428838240000000

= 5472392655571394
