No problem, we've got 80345531 and 8068494 to multiply
80345531 × 8068494 = 8068494 × (80345531)
+ 8068494 × 1 yielding 8068494
+ 8068494 × 30 that equals 242054820
+ 8068494 × 500 producing 4034247000
+ 8068494 × 5000 that results in 40342470000
+ 8068494 × 40000 that equals 322739760000
+ 8068494 × 300000 that results in 2420548200000
+ 8068494 × 0000000 resulting in 0
+ 8068494 × 80000000 that is equal 645479520000000

= 648267434800314
