Alright, let's work through 4381 times 1887 step by step
4381 × 1887 = 1887 × (4381)
+ 1887 × 1 that is equal 1887
+ 1887 × 80 yielding 150960
+ 1887 × 300 yielding 566100
+ 1887 × 4000 producing 7548000

= 8266947
