Alright, let's work through 1004 times 1607 step by step
1004 × 1607 = 1607 × (1004)
+ 1607 × 4 resulting in 6428
+ 1607 × 00 which equals 0
+ 1607 × 000 yielding 0
+ 1607 × 1000 that equals 1607000

= 1613428
