Alright, let's work through 99807618 times 43858909 step by step
99807618 × 43858909 = 43858909 × (99807618)
+ 43858909 × 8 giving us 350871272
+ 43858909 × 10 resulting in 438589090
+ 43858909 × 600 giving us 26315345400
+ 43858909 × 7000 producing 307012363000
+ 43858909 × 00000 what gives us 0
+ 43858909 × 800000 giving us 35087127200000
+ 43858909 × 9000000 producing 394730181000000
+ 43858909 × 90000000 that results in 3947301810000000

= 4377453235368762
