Let's calculate 1387 x 3021
1387 × 3021 = 3021 × (1387)
+ 3021 × 7 that results in 21147
+ 3021 × 80 giving us 241680
+ 3021 × 300 that is equal 906300
+ 3021 × 1000 that results in 3021000

= 4190127
