No problem, we've got 80873025 and 10050347 to multiply
80873025 × 10050347 = 10050347 × (80873025)
+ 10050347 × 5 yielding 50251735
+ 10050347 × 20 that equals 201006940
+ 10050347 × 000 giving us 0
+ 10050347 × 3000 that equals 30151041000
+ 10050347 × 70000 that equals 703524290000
+ 10050347 × 800000 producing 8040277600000
+ 10050347 × 0000000 what gives us 0
+ 10050347 × 80000000 resulting in 804027760000000

= 812801964189675
