calling an element and multiplying from a double list

Question

Sorry for repeating the question but I have read the references and I don't know why the output is not displayed. It should be something in the index because its giving me out of bounds.. but i don't know how to fix it.. Please have alook..

have a csv file MobileId;MenuTreeView;MenuName;MenuInfo;MenuAction
1042;MP_Menubaum;user_key1;user_key1;PressKey
1042;MP_Menubaum;Wait;1;Wait
1042;MP_Menubaum;TS:Coord;38%55%:0:0;TouchScreen
1042;MP_Menubaum;Wait;2;Wait
and I have the MenuInfo as a List and MenuAction as a List.
I want to get the 38 before the percentage sign in the MenuInfo List and Multiply it by the value called Length, Length is a double List that is defined in another Method..
and get the value 55 in the MenuInfo and multiply it by width (The same procedure as length)
This is what i have done but it gives me out of index....how can i multiply the right value in the L List

I uploaded the code