Alright, let's work through 18240487 times 99620385 step by step
18240487 × 99620385 = 99620385 × (18240487)
+ 99620385 × 7 which equals 697342695
+ 99620385 × 80 giving us 7969630800
+ 99620385 × 400 that is equal 39848154000
+ 99620385 × 0000 yielding 0
+ 99620385 × 40000 producing 3984815400000
+ 99620385 × 200000 resulting in 19924077000000
+ 99620385 × 8000000 which equals 796963080000000
+ 99620385 × 10000000 yielding 996203850000000

= 1817124337527495
