Alright, let's work through 5721 times 4128 step by step
5721 × 4128 = 4128 × (5721)
+ 4128 × 1 that is equal 4128
+ 4128 × 20 that equals 82560
+ 4128 × 700 that results in 2889600
+ 4128 × 5000 that is equal 20640000

= 23616288
