Let's calculate 7871 x 3009
7871 × 3009 = 3009 × (7871)
+ 3009 × 1 that is equal 3009
+ 3009 × 70 that is equal 210630
+ 3009 × 800 what gives us 2407200
+ 3009 × 7000 which equals 21063000

= 23683839
