Alright, let's work through 21897042 times 28163423 step by step
21897042 × 28163423 = 28163423 × (21897042)
+ 28163423 × 2 producing 56326846
+ 28163423 × 40 that is equal 1126536920
+ 28163423 × 000 which equals 0
+ 28163423 × 7000 that equals 197143961000
+ 28163423 × 90000 producing 2534708070000
+ 28163423 × 800000 that results in 22530738400000
+ 28163423 × 1000000 that results in 28163423000000
+ 28163423 × 20000000 giving us 563268460000000

= 616695656294766
