Alright, let's work through 4083 times 5145 step by step
4083 × 5145 = 5145 × (4083)
+ 5145 × 3 producing 15435
+ 5145 × 80 producing 411600
+ 5145 × 000 which equals 0
+ 5145 × 4000 that equals 20580000

= 21007035
