text: from math import pow
  
  def div(x, y):
      return x / (y + 0.0)
  
  def square(x):
      return pow(x, 2)
  
  def BMI(weight, height):
      return div(weight, square(height))
  
  def output(name, BMI1):
      return """
  Hello {}
  Your BMI is {}
  """.format(name, BMI1)
  
  def main():
      #input
      name = raw_input("type your name: ")
      weight = raw_input("type your weight in kg: ")
      height = raw_input("type your height in metres: ")
      #processing
      BMI1 = BMI(float(weight), float(height))
      #output
      print output(name, BMI1)
  
  main()
  