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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
ft =in * 0.083333
let areaInFeet =
```

Hey Yasser,

to change the height and width values from inches to feet just divide them by 12. Then multiply both values and assign them to the `areaInFeet` constant.

Like so:

```// the height and width of a wall
let height = 120.0 // in inches
let width = 144.0 // in inches
let areaInFeet = (height / 12) * (width / 12)
```

I hope that helps, if you have further questions feel free to ask! :)