Gross / net salary calculator

Implement a program that calculates the gross and net salary of an employee. The program will request as data: the number of hours worked (nh), the price of the hour (ph) and the applicable withholding as a percentage (w). The gross (GS) and net (NS) salary is calculated as:

1. \[GS = nh * ph\]
2. \[NS = GS - (w/100*GS)\]

>>> %Run 
    Enter the number of hours worked: 56
    Enter the price of the hour: 10
    Enter the applicable withholding in %: 25
    The gross salary is: 560.0
    The net salary is: 420.0

To test your program you can try with the following test cases:

test case ID	inputs			expected output
	\(nh\)	\(ph\)	\(w\)	gross salary	net salary
1	56 hours	10 euros/hour	25%	560 euros	420 euros
2	2.5 hours	20.4 euros/hour	25.6%	51.0 euros	37.944 euros
3	1 hour	25 euros/hour	0.1%	25.0 euros	24.975 euros
4	125 hours	20 euros/hour	0%	2500.0 euros	2500.00 euros

Add a table with test cases. Also added cases for values that are
less obvious like 2.5 hours and 0.1%. So they test again their
assumptions of the types of the variables.