Alright, let's work through 6580 times 8891 step by step
6580 × 8891 = 8891 × (6580)
+ 8891 × 0 yielding 0
+ 8891 × 80 giving us 711280
+ 8891 × 500 that results in 4445500
+ 8891 × 6000 that results in 53346000

= 58502780
