ActionScript 3.0 :: How To Divide These To Values

I'm creating a small application and I'm having problems trying to divide the value from a textField.What I have here are 4 inputFields and 2 textFields the problem is that when I try to divide the value from "totalYields" by 1 and display it on my 'textField' named "txtParts" it shows the same value on both textFields in other words it shows only the value from "totalYields" and ignores the operation.

This is the line I'm having problems with:

Code:
var totalParts:Number= Number(totalYields) / 1;

This is the complete code:

Code:
enterBtn.addEventListener(MouseEvent.CLICK, calculator,false,0,true);
function calculator(event:MouseEvent):void {
var partW:Number=Number(partW_txt.text);

[code]....