Alright, let's work through 2544 times 8081 step by step
2544 × 8081 = 8081 × (2544)
+ 8081 × 4 that equals 32324
+ 8081 × 40 which equals 323240
+ 8081 × 500 that is equal 4040500
+ 8081 × 2000 that equals 16162000

= 20558064
