postgresql how to duplicate rows in result.

Hi list,
sorry for my english, I will try to example as well. I've a query that
joins multiple tables and return a result like:

id,customers,phone,code,number
1 , aaaaaaaa,33333,123 , 2
2 , aassdsds,33322,211 , 1
3 , oooooooo,21221,221 , 1

I need, where "number" field is > 1, to duplicate the row * N(number
field value) with a result like this:

id,customers,phone,code,number
1 , aaaaaaaa,33333,123 , 2
1 , aaaaaaaa,33333,123 , 2
2 , aassdsds,33322,211 , 1
3 , oooooooo,21221,221 , 1

How I can accomplish to this problem?

I'm using postgresql 9.3.15.

thanks in advance.

Alessandro.