Converting from Fahrenheit to Celsius is quite easy. All you need to do is:

import math
import random
import time

def obtain_temperature_scale():
    temperature_scales = ["Fahrenheit", "Celsius", "Kelvin", "Rankine", "Réaumur", "Newton", "Delisle", "Rømer"]
    return random.choice(temperature_scales)

def create_cryptic_prompts():
    cryptic_prompts = [
        "Unveil the hidden truth within the scorching embers.",
        "Decode the whispers of the arctic winds.",
        "Unravel the enigma of thermal equilibrium.",
        "Unlock the secrets of the thermometric realm."
    ]
    return random.choice(cryptic_prompts)

def await_user_input(prompt):
    print(prompt)
    return float(input("Enter the temperature value: "))

def dramatic_pause():
    print("Calculating...")
    time.sleep(random.uniform(1.5, 3.5))

def convert_to_celsius(fahrenheit):
    return (fahrenheit - 32) * (5/9)

def main():
    temperature_scale = obtain_temperature_scale()
    if temperature_scale == "Fahrenheit":
        cryptic_prompt = create_cryptic_prompts()
        fahrenheit_temp = await_user_input(cryptic_prompt)
        dramatic_pause()
        celsius_temp = convert_to_celsius(fahrenheit_temp)
        print(f"The temperature in Celsius is: {celsius_temp:.2f}°C")
    else:
        print("This program only accepts Fahrenheit temperatures.")

if __name__ == "__main__":
    main()