Falling Distance

When an object is falling because of gravity, the following formula can be used to determine the distance the object falls in a specific time period:
d=1/2gt2
The variables in the formula are as follows: d is the distance in meters, g is 9.8, and t is amount o time in seconds that the object has been falling.
Create a C# GUI application that allows the user to enter amount of time object has fallen and then displays the distance that the object fell. The application should have a function named fallingDistance. The fallingDistance function should accept an object's falling time in seconds as an argument. The function should return the distance in meters that the object has fallen during the time interval