The equivalent of multiplying 1000 to any number, is to add 3 zeros at the end of the number. That's the easiest way!
Suppose, I have an number, which is 78. I can multiply it with 1000, in the normal multiplication system.
7 8
X 1 0 0 0
------------------------
0 0 0 0
0 0 0 0 X
0 0 0 0 X X
+ 7 8 X X X
------------------------
7 8 0 0 0
Let's follow the more easier way. Let's see whether it produces the same correct result or not.
So, now, try adding 3 zeros to 78. It makes 78000.
Yes, it matches! Hurrah! That means this easy procedure (system/method) is the same as multipllying any number by 1000. You see, it produces the same result.
ANSWER: Adding 3 zeros to the end of any number is the same as multiplying it (any number) by 1000.
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