Square Feet Using Arrays?

I need to take a minimum and maximum value from the user for length and width using an array(s) and display the square feet of all values. Since the values can be any number the array(s) size cannot be defined. In my form I have 4 text boxes (MinWidthTextBox, MaxWidthTextBox, MinLengthTextBox, MaxLengthTextBox). I have been able to take the text from each text box and initialize 2 separate arrays with those values, however I am completely lost on how to get the square feet from each element. In other words I don't know how to do this:

WidthArray(0) * LengthArray(0)
WidthArray(1) * LengthArray(1)
WidthArray(2) * LengthArray(2) etc. etc.

I don't know if that is possible or if I am over complicating things.

Here is the code I used for my arrays:

Dim WidthArray() As Integer
Dim LengthArray() As Integer
Dim MinWidthInteger, MaxWidthInteger, MinLengthInteger, MaxLengthInteger,

[Code]......

In each For loop I can output the elements to a listbox for text and it works but again I have no idea how to multiply each element to one another to get square feet. Should I be using a multidimension array instead?