Let's calculate 20338427 x 80100797
20338427 × 80100797 = 80100797 × (20338427)
+ 80100797 × 7 giving us 560705579
+ 80100797 × 20 giving us 1602015940
+ 80100797 × 400 yielding 32040318800
+ 80100797 × 8000 giving us 640806376000
+ 80100797 × 30000 that results in 2403023910000
+ 80100797 × 300000 which equals 24030239100000
+ 80100797 × 0000000 resulting in 0
+ 80100797 × 20000000 giving us 1602015940000000

= 1629124212426319
