Let's calculate 3544 x 4391
3544 × 4391 = 4391 × (3544)
+ 4391 × 4 what gives us 17564
+ 4391 × 40 that results in 175640
+ 4391 × 500 that results in 2195500
+ 4391 × 3000 giving us 13173000

= 15561704
