Alright, let's work through 6581 times 8513 step by step
6581 × 8513 = 8513 × (6581)
+ 8513 × 1 which equals 8513
+ 8513 × 80 that is equal 681040
+ 8513 × 500 that is equal 4256500
+ 8513 × 6000 which equals 51078000

= 56024053
