Alright, let's work through 8583 times 8145 step by step
8583 × 8145 = 8145 × (8583)
+ 8145 × 3 giving us 24435
+ 8145 × 80 yielding 651600
+ 8145 × 500 which equals 4072500
+ 8145 × 8000 producing 65160000

= 69908535
