No problem, we've got 81428836 and 68138241 to multiply
81428836 × 68138241 = 68138241 × (81428836)
+ 68138241 × 6 yielding 408829446
+ 68138241 × 30 what gives us 2044147230
+ 68138241 × 800 that equals 54510592800
+ 68138241 × 8000 which equals 545105928000
+ 68138241 × 20000 producing 1362764820000
+ 68138241 × 400000 resulting in 27255296400000
+ 68138241 × 1000000 producing 68138241000000
+ 68138241 × 80000000 which equals 5451059280000000

= 5548417651717476
