Alright, let's work through 1007 times 2646 step by step
1007 × 2646 = 2646 × (1007)
+ 2646 × 7 producing 18522
+ 2646 × 00 giving us 0
+ 2646 × 000 that is equal 0
+ 2646 × 1000 producing 2646000

= 2664522
