Alright, let's work through 5040 times 520 step by step
5040 × 520 = 520 × (5040)
+ 520 × 0 giving us 0
+ 520 × 40 resulting in 20800
+ 520 × 000 which equals 0
+ 520 × 5000 that results in 2600000

= 2620800
