Alright, let's work through 6520 times 3511 step by step
6520 × 3511 = 3511 × (6520)
+ 3511 × 0 that equals 0
+ 3511 × 20 which equals 70220
+ 3511 × 500 producing 1755500
+ 3511 × 6000 resulting in 21066000

= 22891720
