We're going to solve 8004 multiplied by 2391
8004 × 2391 = 2391 × (8004)
+ 2391 × 4 what gives us 9564
+ 2391 × 00 giving us 0
+ 2391 × 000 that results in 0
+ 2391 × 8000 that equals 19128000

= 19137564
