Alright, let's work through 6578 times 870 step by step
6578 × 870 = 870 × (6578)
+ 870 × 8 yielding 6960
+ 870 × 70 that equals 60900
+ 870 × 500 that equals 435000
+ 870 × 6000 resulting in 5220000

= 5722860
