Alright, let's work through 4001 times 8580 step by step
4001 × 8580 = 8580 × (4001)
+ 8580 × 1 which equals 8580
+ 8580 × 00 that results in 0
+ 8580 × 000 producing 0
+ 8580 × 4000 producing 34320000

= 34328580
