Alright, let's work through 3857 times 3958 step by step
3857 × 3958 = 3958 × (3857)
+ 3958 × 7 what gives us 27706
+ 3958 × 50 that is equal 197900
+ 3958 × 800 that equals 3166400
+ 3958 × 3000 what gives us 11874000

= 15266006
