Make an application in Android Studio using java language for basic math formulas.

1- The first activity should have 4 buttons (Area of Circle, Area of Square, Convert Celsius to Fahrenheit, Convert Miles to Kilo meters) each button should open an activity to calculate each.

2- for each formula you have to create a separate activity. for example, If I click on area of circle it should open an activity to enter the radius and calculate button and it should display the result in the same activity.

3- Similarly if you click on the second button. So, one more activity will open and whatever the formula for the second button the activity will preform that task.

4- It should be 5 activities. the main activity which contain the 4 buttons, and the 4 different formula activities.

for example like this:

Enter Radius Area of Circle Calculate Area of Circle Area of Circle Display Result here