No problem, we've got 87645471 and 77859619 to multiply
87645471 × 77859619 = 77859619 × (87645471)
+ 77859619 × 1 which equals 77859619
+ 77859619 × 70 giving us 5450173330
+ 77859619 × 400 producing 31143847600
+ 77859619 × 5000 what gives us 389298095000
+ 77859619 × 40000 that equals 3114384760000
+ 77859619 × 600000 producing 46715771400000
+ 77859619 × 7000000 yielding 545017333000000
+ 77859619 × 80000000 resulting in 6228769520000000

= 6824042979135549
