Python Programming - Circumference of a Circle

Short Python program that calculates the circumference of a circle.

Code is below and attached.
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print ("This will calculate the circumference of a circle.")
pi = 3.141592
print ("Pi is:", pi)

DiameterEntered = input("Please enter the diameter: ")

# Converting diameter to a floating number
DiameterFloat = float(DiameterEntered)

# Calculating the circumference of a circle
circumference = pi*DiameterFloat
print ("The circumference is: ", circumference)