Alright, let's work through 1543 times 2517 step by step
1543 × 2517 = 2517 × (1543)
+ 2517 × 3 what gives us 7551
+ 2517 × 40 what gives us 100680
+ 2517 × 500 which equals 1258500
+ 2517 × 1000 yielding 2517000

= 3883731
