Let's calculate 6871 x 2987
6871 × 2987 = 2987 × (6871)
+ 2987 × 1 which equals 2987
+ 2987 × 70 which equals 209090
+ 2987 × 800 resulting in 2389600
+ 2987 × 6000 that is equal 17922000

= 20523677
