No problem, we've got 80651178 and 78850362 to multiply
80651178 × 78850362 = 78850362 × (80651178)
+ 78850362 × 8 yielding 630802896
+ 78850362 × 70 resulting in 5519525340
+ 78850362 × 100 that results in 7885036200
+ 78850362 × 1000 what gives us 78850362000
+ 78850362 × 50000 that results in 3942518100000
+ 78850362 × 600000 yielding 47310217200000
+ 78850362 × 0000000 that results in 0
+ 78850362 × 80000000 which equals 6308028960000000

= 6359374581026436
