Alright, let's work through 3981 times 1897 step by step
3981 × 1897 = 1897 × (3981)
+ 1897 × 1 that results in 1897
+ 1897 × 80 that equals 151760
+ 1897 × 900 that equals 1707300
+ 1897 × 3000 what gives us 5691000

= 7551957
