Alright, let's work through 3891 times 524 step by step
3891 × 524 = 524 × (3891)
+ 524 × 1 yielding 524
+ 524 × 90 that equals 47160
+ 524 × 800 producing 419200
+ 524 × 3000 resulting in 1572000

= 2038884
