## box1 – Volume and Area of a Box (easy version)

Write a program that calculates the volume and the external surface area of a rectangular box given its width, height and depth. ### Input and output

Input consists of a single line with three natural numbers w, h and d where 0 < w, h, d ≤ 999. These numbers indicate respectively the width, height and depth of the given box.

The output should contain two lines. The first line of output should indicate the volume in the following format:

``````The volume of a <w> by <h> by <d> box is <v>.
``````

The second line of output should indicate the area in the following format:

``````The surface area of a <w> by <h> by <d> box is <a>.
``````

Replace `<w>`, `<h>` and `<d>` by the dimensions of the box in the same order given in the input. Replace `<v>` and `<a>` by the volume and area respectively.

#### Example input 1

``````1 1 1
``````

#### Example output 1

``````The volume of a 1 by 1 by 1 box is 1.
The surface area of a 1 by 1 by 1 box is 6.
``````

#### Example input 2

``````3 4 5
``````

#### Example output 2

``````The volume of a 3 by 4 by 5 box is 60.
The surface area of a 3 by 4 by 5 box is 94.
``````

### The `volume` and `area` functions

In order to get a full score, your program should be implemented using two functions `volume` and `area`. These functions should take the three integers indicating dimensions of a box and return an integer indicating respectively the box’s volume and area. Please refer to the information for your chosen language:

• C prototypes: `int volume(int w, int h, int d);`, `int area(int w, int h, int d);`
• Haskell type: `volume, area :: Int -> Int -> Int -> Int`
• Python definitions: `def volume(w,h,d):`, `def area(w,h,d):`
• C# definition: `public static int Volume(int w, int h, int d)` and `public static int Area(int w, int h, int d)` inside a class `Program`
• C++ prototypes: `int volume(int w, int h, int d);`, `int area(int w, int h, int d);`
• Java definition: `public static int volume(int w, int h, int d)` and `public static int area(int w, int h, int d)` inside a class `Box`
• JavaScript definitions: `function volume(w,h,d)`, `function area(w,h,d)`
• Lua definitions: `function volume (w, h, d)`, `function area (w, h, d)`
• Ruby definitions: `def volume(w,h,d)`, `def area(w,h,d)`

Specifically for this exercise when using Python, JavaScript, Lua or Ruby, avoid using `sys.exit()`, `process.exit()`, `os.exit()` or `exit`, as your program is appended with some extra assertions in one of the test sets.

### Scoring

• 2/12: produces the correct product for the above examples
• 8/12: produces the correct product for other examples
• 12/12: implements the `volume` and `area` functions