input: Write a python function to create a Rectangle class that can calculate the area and perimeter of a rectangle.
  assert Rectangle(5, 10).get_area() == 50
  assert Rectangle(5, 10).get_perimeter() == 30
  assert Rectangle(3, 4).get_area() == 12
  assert Rectangle(3, 4).get_perimeter() == 14
output: class Rectangle:
      def __init__(self, width, height):
          self.width = width
          self.height = height
  
      def get_area(self):
          return self.width * self.height
  
      def get_perimeter(self):
          return 2 * (self.width + self.height)