No problem, we've got 83163877 and 61696317 to multiply
83163877 × 61696317 = 61696317 × (83163877)
+ 61696317 × 7 which equals 431874219
+ 61696317 × 70 what gives us 4318742190
+ 61696317 × 800 yielding 49357053600
+ 61696317 × 3000 that is equal 185088951000
+ 61696317 × 60000 resulting in 3701779020000
+ 61696317 × 100000 that equals 6169631700000
+ 61696317 × 3000000 what gives us 185088951000000
+ 61696317 × 80000000 producing 4935705360000000

= 5130904918341009
