No problem, we've got 5584 and 3656 to multiply
5584 × 3656 = 3656 × (5584)
+ 3656 × 4 giving us 14624
+ 3656 × 80 producing 292480
+ 3656 × 500 what gives us 1828000
+ 3656 × 5000 resulting in 18280000

= 20415104
