Let's calculate 5621 x 2840
5621 × 2840 = 2840 × (5621)
+ 2840 × 1 resulting in 2840
+ 2840 × 20 that is equal 56800
+ 2840 × 600 that results in 1704000
+ 2840 × 5000 that is equal 14200000

= 15963640
