No problem, we've got 99817139 and 79747344 to multiply
99817139 × 79747344 = 79747344 × (99817139)
+ 79747344 × 9 yielding 717726096
+ 79747344 × 30 that is equal 2392420320
+ 79747344 × 100 that results in 7974734400
+ 79747344 × 7000 which equals 558231408000
+ 79747344 × 10000 what gives us 797473440000
+ 79747344 × 800000 that results in 63797875200000
+ 79747344 × 9000000 yielding 717726096000000
+ 79747344 × 90000000 that is equal 7177260960000000

= 7960151720928816
