No problem, we've got 78199678 and 85020172 to multiply
78199678 × 85020172 = 85020172 × (78199678)
+ 85020172 × 8 producing 680161376
+ 85020172 × 70 that equals 5951412040
+ 85020172 × 600 what gives us 51012103200
+ 85020172 × 9000 resulting in 765181548000
+ 85020172 × 90000 that is equal 7651815480000
+ 85020172 × 100000 that equals 8502017200000
+ 85020172 × 8000000 giving us 680161376000000
+ 85020172 × 70000000 which equals 5951412040000000

= 6648550073904616
