No problem, we've got 1642 and 8638 to multiply
1642 × 8638 = 8638 × (1642)
+ 8638 × 2 giving us 17276
+ 8638 × 40 producing 345520
+ 8638 × 600 giving us 5182800
+ 8638 × 1000 resulting in 8638000

= 14183596
