No problem, we've got 80399733 and 99051710 to multiply
80399733 × 99051710 = 99051710 × (80399733)
+ 99051710 × 3 resulting in 297155130
+ 99051710 × 30 that results in 2971551300
+ 99051710 × 700 which equals 69336197000
+ 99051710 × 9000 producing 891465390000
+ 99051710 × 90000 giving us 8914653900000
+ 99051710 × 300000 resulting in 29715513000000
+ 99051710 × 0000000 giving us 0
+ 99051710 × 80000000 yielding 7924136800000000

= 7963731037193430
