# Exercise: Calculations

- Extend the examples/basics/rectangular_basic.py file from the earlier example to print both the area and the circumference of the rectangle.
- Write a script that has a variable holding the radius of a circle and prints out the area of the circle and the circumference of the circle.
- Write a script that has two numbers a and b and prints out the results of a+b, a-b, a*b, a/b