Alright, let's work through 4021 times 1583 step by step
4021 × 1583 = 1583 × (4021)
+ 1583 × 1 which equals 1583
+ 1583 × 20 that equals 31660
+ 1583 × 000 that equals 0
+ 1583 × 4000 producing 6332000

= 6365243
