No problem, we've got 81397138 and 55506553 to multiply
81397138 × 55506553 = 55506553 × (81397138)
+ 55506553 × 8 which equals 444052424
+ 55506553 × 30 resulting in 1665196590
+ 55506553 × 100 yielding 5550655300
+ 55506553 × 7000 giving us 388545871000
+ 55506553 × 90000 producing 4995589770000
+ 55506553 × 300000 that equals 16651965900000
+ 55506553 × 1000000 that equals 55506553000000
+ 55506553 × 80000000 what gives us 4440524240000000

= 4518074554445314
