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Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.  # How do you find the area in feet of constants given the area and width in inches.

height is 120.0 inches width is 144.0 inches and they're both constants "let"

area.swift
```// the height and width of a wall
let height = 120.0 // in inches
let width = 144.0 // in inches
```
```// 1 foot = 12 inches
let area = (height * width) / 12
```

If I understood the question. You need to divide by 144, not 12. height and width are both in inches, so you need to convert both to feet.

```let height = 120.0 // in inches
let width = 144.0 // in inches
/*
Converting inches to feet:
heightInFeet = height / 12
widthInFeet = width / 12
Calculating area:
areaInSquareFeet = heightInFeet * widthInFeet
areaInSquareFeet = (height / 12) * (width / 12)
areaInSquareFeet = height * width / (12 * 12)
areaInSquareFeet = height * width / 144
*/
let area = height * width / 144
```

Thanks for the correction Anjali :)