Alright, let's work through 55505999 times 43000891 step by step
55505999 × 43000891 = 43000891 × (55505999)
+ 43000891 × 9 resulting in 387008019
+ 43000891 × 90 resulting in 3870080190
+ 43000891 × 900 resulting in 38700801900
+ 43000891 × 5000 that is equal 215004455000
+ 43000891 × 00000 which equals 0
+ 43000891 × 500000 producing 21500445500000
+ 43000891 × 5000000 that results in 215004455000000
+ 43000891 × 50000000 which equals 2150044550000000

= 2386807412845109
