No problem, we've got 80407307 and 8477523 to multiply
80407307 × 8477523 = 8477523 × (80407307)
+ 8477523 × 7 resulting in 59342661
+ 8477523 × 00 producing 0
+ 8477523 × 300 that equals 2543256900
+ 8477523 × 7000 producing 59342661000
+ 8477523 × 00000 that is equal 0
+ 8477523 × 400000 that is equal 3391009200000
+ 8477523 × 0000000 that is equal 0
+ 8477523 × 80000000 that equals 678201840000000

= 681654794460561
