No problem, we've got 4087 and 5358 to multiply
4087 × 5358 = 5358 × (4087)
+ 5358 × 7 that is equal 37506
+ 5358 × 80 giving us 428640
+ 5358 × 000 that is equal 0
+ 5358 × 4000 resulting in 21432000

= 21898146
