Alright, let's work through 6524 times 1720 step by step
6524 × 1720 = 1720 × (6524)
+ 1720 × 4 that is equal 6880
+ 1720 × 20 that results in 34400
+ 1720 × 500 what gives us 860000
+ 1720 × 6000 that equals 10320000

= 11221280
