We want to estimate the cost of painting a property.
Interior wall painting cost is 18 per square feet and exterior wall painting cost is 12 per square feet.
Take input as:
1. Number of interior Walls
2. Number of exterior Walls
3. Surface Area of each Interior Wall in units of square feet.
4. Surface Area of each Exterior Wall in units of square feet.
If user enters zero as number of walls then skip Surface are values as User may dont want to paint the walls.
Calcuate and display the total cost of painting the property.