No problem, we've got 80099397 and 55597647 to multiply
80099397 × 55597647 = 55597647 × (80099397)
+ 55597647 × 7 giving us 389183529
+ 55597647 × 90 that results in 5003788230
+ 55597647 × 300 that is equal 16679294100
+ 55597647 × 9000 that results in 500378823000
+ 55597647 × 90000 producing 5003788230000
+ 55597647 × 000000 yielding 0
+ 55597647 × 0000000 that results in 0
+ 55597647 × 80000000 giving us 4447811760000000

= 4453337999318859
