Printing a decimal in non-scientific form in Mathematica

Question

I would like to print the number represented by 3*10^-9 in non-scientific form: 0.000000003. How can I do this? NumberForm[N[3*10^-9], {Infinity, 10}] does not work. Thank you.

Answer 1

AccountingForm[3. 10^-9, NumberSigns -> {"-", ""}]
AccountingForm[-3. 10^-9, NumberSigns -> {"-", ""}]

(* 0.000000003 *)
(* -0.000000003 *)