Alright, let's work through 3864 times 5372 step by step
3864 × 5372 = 5372 × (3864)
+ 5372 × 4 which equals 21488
+ 5372 × 60 giving us 322320
+ 5372 × 800 giving us 4297600
+ 5372 × 3000 that equals 16116000

= 20757408
