We're going to solve 7923 multiplied by 1644
7923 × 1644 = 1644 × (7923)
+ 1644 × 3 that is equal 4932
+ 1644 × 20 what gives us 32880
+ 1644 × 900 producing 1479600
+ 1644 × 7000 giving us 11508000

= 13025412
