No problem, we've got 77807399 and 66634525 to multiply
77807399 × 66634525 = 66634525 × (77807399)
+ 66634525 × 9 that equals 599710725
+ 66634525 × 90 resulting in 5997107250
+ 66634525 × 300 what gives us 19990357500
+ 66634525 × 7000 that is equal 466441675000
+ 66634525 × 00000 yielding 0
+ 66634525 × 800000 what gives us 53307620000000
+ 66634525 × 7000000 producing 466441675000000
+ 66634525 × 70000000 that equals 4664416750000000

= 5184659073850475
