A difficult control input question

[some_one]

htp://s290,photobucket,com/albums/ll279/transgalactic/?action=view&current=IMG_8838,jpg

the main problem comes when in one input i need to divide the number by 2
(subtract a zero from the original input)

while in other control input i need to multiply by two
(which meens to add a zero to the original input)

i don't know how to delete or add an output
when i have a certain control input

the number of outputs is constant

what should i do??

 

[Defennder]

Your hyperlink seems to have commas instead of periods. This should be it:

"htp://s290.photobucket.com/albums/ll279/transgalactic/?action=view&current=IMG_8838.jpg"[/URL]

EDIT: Strange it only works if I copy and paste the URL into the address bar, not when I click the link.