Alright, let's work through 2544 times 2120 step by step
2544 × 2120 = 2120 × (2544)
+ 2120 × 4 what gives us 8480
+ 2120 × 40 giving us 84800
+ 2120 × 500 producing 1060000
+ 2120 × 2000 producing 4240000

= 5393280
