No problem, we've got 3921 and 5358 to multiply
3921 × 5358 = 5358 × (3921)
+ 5358 × 1 producing 5358
+ 5358 × 20 resulting in 107160
+ 5358 × 900 resulting in 4822200
+ 5358 × 3000 that is equal 16074000

= 21008718
