No problem, we've got 1589 and 4391 to multiply
1589 × 4391 = 4391 × (1589)
+ 4391 × 9 that results in 39519
+ 4391 × 80 which equals 351280
+ 4391 × 500 what gives us 2195500
+ 4391 × 1000 which equals 4391000

= 6977299
