Let's calculate 3971 x 2102
3971 × 2102 = 2102 × (3971)
+ 2102 × 1 that results in 2102
+ 2102 × 70 what gives us 147140
+ 2102 × 900 yielding 1891800
+ 2102 × 3000 that results in 6306000

= 8347042
