No problem, we've got 5428 and 3649 to multiply
5428 × 3649 = 3649 × (5428)
+ 3649 × 8 what gives us 29192
+ 3649 × 20 that equals 72980
+ 3649 × 400 that results in 1459600
+ 3649 × 5000 that is equal 18245000

= 19806772
