No problem, we've got 4491 and 9728 to multiply
4491 × 9728 = 9728 × (4491)
+ 9728 × 1 that is equal 9728
+ 9728 × 90 what gives us 875520
+ 9728 × 400 that equals 3891200
+ 9728 × 4000 yielding 38912000

= 43688448
