No problem, we've got 81418342 and 72129213 to multiply
81418342 × 72129213 = 72129213 × (81418342)
+ 72129213 × 2 producing 144258426
+ 72129213 × 40 that is equal 2885168520
+ 72129213 × 300 resulting in 21638763900
+ 72129213 × 8000 what gives us 577033704000
+ 72129213 × 10000 yielding 721292130000
+ 72129213 × 400000 producing 28851685200000
+ 72129213 × 1000000 which equals 72129213000000
+ 72129213 × 80000000 resulting in 5770337040000000

= 5872640932224846
