You are using 7 in both
In the first on you just multiply 7 x 4=28
In the second if you factor out 1000
The problem looks like this
7 x 2 x (1000)
7 x 2 is like the 7 x 4
When you multiply by 10, 100, 1000 etc you just add that many zeroes to the right of the number
Here is what it looks like
7 x 2 is 14 then 1000 has 3 0's so add them to 14, 14000
