Let's calculate 5397 x 5120
5397 × 5120 = 5120 × (5397)
+ 5120 × 7 resulting in 35840
+ 5120 × 90 resulting in 460800
+ 5120 × 300 resulting in 1536000
+ 5120 × 5000 that results in 25600000

= 27632640
