No problem, we've got 86556423 and 77081225 to multiply
86556423 × 77081225 = 77081225 × (86556423)
+ 77081225 × 3 which equals 231243675
+ 77081225 × 20 yielding 1541624500
+ 77081225 × 400 what gives us 30832490000
+ 77081225 × 6000 resulting in 462487350000
+ 77081225 × 50000 producing 3854061250000
+ 77081225 × 500000 that equals 38540612500000
+ 77081225 × 6000000 which equals 462487350000000
+ 77081225 × 80000000 resulting in 6166498000000000

= 6671875116458175
