Alright, let's work through 6381 times 4887 step by step
6381 × 4887 = 4887 × (6381)
+ 4887 × 1 yielding 4887
+ 4887 × 80 what gives us 390960
+ 4887 × 300 what gives us 1466100
+ 4887 × 6000 that results in 29322000

= 31183947
