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# I DO NOT UNDERSTAND WHAT DO WRONG! Can some help me?

i would like to get help with this

area.swift
```// the height and width of a wall
let height = 120.0 // in inches
let width = 144.0 // in inches

let area = height * width

let areaInFeet = Area / 12
``` Firstly, you have capital A when calling area which is wrong. But thats not the main problem. You are trying to do the following:

(120 * 144) / 12 = 1440 : This is wrong

(120 / 12) * (144 / 12) = 120 : This is correct

```let areaInFeet = (height / 12) * (width / 12)
``` PLUS
```let areaInFeet = Area / 12
```

First of all, you have written area with a capital a, therefore it is an undefined variable which throws an error. Changing this will make your code compile, however, you need to tweak the calculation:

Your 'areaInFeet' constant has the wrong value. Divide height by 12 to get the height in feet. Do the same with the width. Then multiply the height in feet by the width in feet.

Hope that helps :)

thanks a lot

thanks a lot

I really appreciate the fast reply!

thanks Guys