No problem, we've got 2391 and 9642 to multiply
2391 × 9642 = 9642 × (2391)
+ 9642 × 1 that is equal 9642
+ 9642 × 90 resulting in 867780
+ 9642 × 300 what gives us 2892600
+ 9642 × 2000 which equals 19284000

= 23054022
