Calculate Area Of Rectangular Prism

Python 3.6.1 (default, Dec 2015, 13:05:11) [GCC 4.8.2] on linux calc_volume(5,6,7) Enter the length: 5 Enter the width: 6 Enter the heigth: 7 Traceback (most recent call last): File "python", line 1, in <module> File "python", line 5, in calc_volume TypeError: can't multiply sequence by non-int of type 'str' This is what I get on the console when I run the code below: def calc_volume(length=float, width=float, height=float): length = input("Enter the length: ") width = input("Enter the width: ") height = input("Enter the heigth: ") calc_volume = (str(length) * str(width) * str(height)) print("The volume of the rectangular prism is " + calc_volume) return calc_volume() I need to get length x width x height and keep getting errors.