No problem, we've got 1586 and 4290 to multiply
1586 × 4290 = 4290 × (1586)
+ 4290 × 6 giving us 25740
+ 4290 × 80 what gives us 343200
+ 4290 × 500 which equals 2145000
+ 4290 × 1000 what gives us 4290000

= 6803940
