No problem, we've got 84046320 and 78640794 to multiply
84046320 × 78640794 = 78640794 × (84046320)
+ 78640794 × 0 resulting in 0
+ 78640794 × 20 yielding 1572815880
+ 78640794 × 300 giving us 23592238200
+ 78640794 × 6000 producing 471844764000
+ 78640794 × 40000 that equals 3145631760000
+ 78640794 × 000000 resulting in 0
+ 78640794 × 4000000 which equals 314563176000000
+ 78640794 × 80000000 which equals 6291263520000000

= 6609469337578080
