No problem, we've got 4584 and 8720 to multiply
4584 × 8720 = 8720 × (4584)
+ 8720 × 4 that is equal 34880
+ 8720 × 80 yielding 697600
+ 8720 × 500 producing 4360000
+ 8720 × 4000 that results in 34880000

= 39972480
