No problem, we've got 86146872 and 66994479 to multiply
86146872 × 66994479 = 66994479 × (86146872)
+ 66994479 × 2 that results in 133988958
+ 66994479 × 70 which equals 4689613530
+ 66994479 × 800 giving us 53595583200
+ 66994479 × 6000 that results in 401966874000
+ 66994479 × 40000 yielding 2679779160000
+ 66994479 × 100000 producing 6699447900000
+ 66994479 × 6000000 resulting in 401966874000000
+ 66994479 × 80000000 resulting in 5359558320000000

= 5771364807119688
