Alright, let's work through 99380511 times 57489503 step by step
99380511 × 57489503 = 57489503 × (99380511)
+ 57489503 × 1 which equals 57489503
+ 57489503 × 10 that is equal 574895030
+ 57489503 × 500 that equals 28744751500
+ 57489503 × 0000 giving us 0
+ 57489503 × 80000 which equals 4599160240000
+ 57489503 × 300000 that is equal 17246850900000
+ 57489503 × 9000000 giving us 517405527000000
+ 57489503 × 90000000 which equals 5174055270000000

= 5713336185276033
