Alright, let's work through 2515 times 8038 step by step
2515 × 8038 = 8038 × (2515)
+ 8038 × 5 that equals 40190
+ 8038 × 10 resulting in 80380
+ 8038 × 500 that results in 4019000
+ 8038 × 2000 giving us 16076000

= 20215570
