Convert Wood -> Gold

[W1f4r3]

Hello again. Im Back from Vacation and already i need a help :O :/
So now im making a TD (Again lol) where you must chop wood to upgrade from Town Hall to castle and u can get easier gold from goldmine(from getting caste able to build farm and more food limit will be get)
But i want that i can write -convert (wood amount) and it will convert the choosen wood amount to gold(gold will be half of chosen wood amount).. But it need to be pair number like 2,4,6,8,10,110,10000000000 e.t.c like when i type:
-convert 100 and it gives me 50 gold so its like wood amount / 2
but if i type - convert 3 it tells only pair numbers can be converted...
SOooo0o0o0o0o0o0o0ooo how to make this ? if u dont understand what i want just say it i will explain better

 

[phyrex1an]

Something like this?

    Events
        Player - Player 1 (Red) types a chat message containing -convert as A substring
        Player - Player 2 (Blue) types a chat message containing -convert as A substring
        Player - Player 3 (Teal) types a chat message containing -convert as A substring
        Player - Player 4 (Purple) types a chat message containing -convert as A substring
    Conditions
        (Length of (Entered chat string)) Greater than 9
    Actions
        Set tmpInteger1 = (Integer((Substring((Entered chat string), 10, (Length of (Entered chat string))))))
        If (All Conditions are True) then do (Then Actions) else do (Else Actions)
            If - Conditions
                (tmpInteger1 mod 2) Not equal to 0
            Then - Actions
                Game - Display to (Player group((Triggering player))) the text: Must be a pair numb...
            Else - Actions
                Player - Add (tmpInteger1 x -1) to (Triggering player) Current lumber
                Player - Add (tmpInteger1 / 2) to (Triggering player) Current gold

You can also have a "goold/lumber shop" where you can bye items that cost x lumber/gold. If item gold/lumber is bought for you give them x/2 gold/lumber