No problem, we've got 80990770 and 78706512 to multiply
80990770 × 78706512 = 78706512 × (80990770)
+ 78706512 × 0 producing 0
+ 78706512 × 70 producing 5509455840
+ 78706512 × 700 that equals 55094558400
+ 78706512 × 0000 what gives us 0
+ 78706512 × 90000 resulting in 7083586080000
+ 78706512 × 900000 resulting in 70835860800000
+ 78706512 × 0000000 which equals 0
+ 78706512 × 80000000 producing 6296520960000000

= 6374501010894240
