Alright, let's work through 1243 times 2571 step by step
1243 × 2571 = 2571 × (1243)
+ 2571 × 3 what gives us 7713
+ 2571 × 40 yielding 102840
+ 2571 × 200 what gives us 514200
+ 2571 × 1000 yielding 2571000

= 3195753
