Alright, let's work through 5266 times 3543 step by step
5266 × 3543 = 3543 × (5266)
+ 3543 × 6 resulting in 21258
+ 3543 × 60 producing 212580
+ 3543 × 200 which equals 708600
+ 3543 × 5000 yielding 17715000

= 18657438
