Let's calculate 80448885 x 63869429
80448885 × 63869429 = 63869429 × (80448885)
+ 63869429 × 5 yielding 319347145
+ 63869429 × 80 which equals 5109554320
+ 63869429 × 800 producing 51095543200
+ 63869429 × 8000 that results in 510955432000
+ 63869429 × 40000 yielding 2554777160000
+ 63869429 × 400000 which equals 25547771600000
+ 63869429 × 0000000 producing 0
+ 63869429 × 80000000 resulting in 5109554320000000

= 5138224348636665
