Alright, let's work through 12099805 times 89030619 step by step
12099805 × 89030619 = 89030619 × (12099805)
+ 89030619 × 5 which equals 445153095
+ 89030619 × 00 that is equal 0
+ 89030619 × 800 that is equal 71224495200
+ 89030619 × 9000 giving us 801275571000
+ 89030619 × 90000 which equals 8012755710000
+ 89030619 × 000000 that results in 0
+ 89030619 × 2000000 resulting in 178061238000000
+ 89030619 × 10000000 giving us 890306190000000

= 1077253128929295
