No problem, we've got 4990 and 8431 to multiply
4990 × 8431 = 8431 × (4990)
+ 8431 × 0 producing 0
+ 8431 × 90 producing 758790
+ 8431 × 900 giving us 7587900
+ 8431 × 4000 producing 33724000

= 42070690
