Alright, let's work through 6458 times 7830 step by step
6458 × 7830 = 7830 × (6458)
+ 7830 × 8 yielding 62640
+ 7830 × 50 producing 391500
+ 7830 × 400 giving us 3132000
+ 7830 × 6000 that is equal 46980000

= 50566140
