Exercise: Calculations

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• Extend the examples/basics/rectangle_basic.py file from the earlier example to print both the area and the circumference of the rectangle.
• Write a script called basic_circle.py 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 called basic_calc.py that has two numbers a and b and prints out the results of a+b, a-b, a*b, a/b