Alright, let's work through 2520 times 8013 step by step
2520 × 8013 = 8013 × (2520)
+ 8013 × 0 what gives us 0
+ 8013 × 20 which equals 160260
+ 8013 × 500 yielding 4006500
+ 8013 × 2000 yielding 16026000

= 20192760
