No problem, we've got 1607 and 2604 to multiply
1607 × 2604 = 2604 × (1607)
+ 2604 × 7 that results in 18228
+ 2604 × 00 what gives us 0
+ 2604 × 600 resulting in 1562400
+ 2604 × 1000 producing 2604000

= 4184628
