Alright, let's work through 5645 times 1592 step by step
5645 × 1592 = 1592 × (5645)
+ 1592 × 5 yielding 7960
+ 1592 × 40 what gives us 63680
+ 1592 × 600 giving us 955200
+ 1592 × 5000 producing 7960000

= 8986840
