def find_greatest(a, b, c):
    greatest = max(a, b, c)
    print(f"The greatest number among {a}, {b}, and {c} is: {greatest}")

# Example usage:
num1 = float(input("Enter first number: "))
num2 = float(input("Enter second number: "))
num3 = float(input("Enter third number: "))
find_greatest(num1, num2, num3)