Alright, let's work through 18820273 times 27242721 step by step
18820273 × 27242721 = 27242721 × (18820273)
+ 27242721 × 3 which equals 81728163
+ 27242721 × 70 resulting in 1906990470
+ 27242721 × 200 producing 5448544200
+ 27242721 × 0000 resulting in 0
+ 27242721 × 20000 that results in 544854420000
+ 27242721 × 800000 which equals 21794176800000
+ 27242721 × 8000000 that results in 217941768000000
+ 27242721 × 10000000 what gives us 272427210000000

= 512715446482833
