when you mulltiply a number aint it bigger than it was before

I assume that you're talking about multipying a number by itself.

It depends on the number...if the absolute value of a real number > 1, then the number becomes greater......but if the absolute value is greater than 0 but less than 1, the number is smaller.

Thus (-3) * (-3)  = 9

But  (2/3)(2/3) = 4/9   which is < 2/3

Yes because you are duplicating a number a certain number of times.

Ex:

5*10=50

the original number was 5 though it was duplicated 10 times, and now it is a 50 wich is bigger that a 5.

no. multiplaying a number by a number more then 1 its bigger but is its smaler then 1 its smaller

$${\mathtt{50}}{\mathtt{\,\times\,}}{\mathtt{0.5}} = {\mathtt{25}}$$ 50 * 0.5 = 25

and

50 * 2 = 100