No problem, we've got 4428 and 991 to multiply
4428 × 991 = 991 × (4428)
+ 991 × 8 that is equal 7928
+ 991 × 20 producing 19820
+ 991 × 400 resulting in 396400
+ 991 × 4000 what gives us 3964000

= 4388148
