Write a Python program that converts seconds into days, hours, minutes, and seconds.

Sure, here is a Python program that converts seconds into days, hours, minutes, and seconds:

def convert_seconds(seconds):
    # Calculate the number of days and the remaining seconds
    days = seconds // (24 * 3600)
    seconds %= (24 * 3600)
    
    # Calculate the number of hours and the remaining seconds
    hours = seconds // 3600
    seconds %= 3600
    
    # Calculate the number of minutes and the remaining seconds
    minutes = seconds // 60
    seconds %= 60
    
    # The remaining seconds are the seconds
    seconds = seconds
    
    return "Days: {}, Hours: {}, Minutes: {}, Seconds: {}".format(days, hours, minutes, seconds)

# Test the function
print(convert_seconds(123456))

In this program, we define a function convert_seconds that takes an integer number of seconds as input. It calculates the number of days by integer division (//) by the number of seconds in a day (24 hours * 3600 seconds/hour), and then calculates the remaining seconds using the modulus operator (%). It repeats this process for hours (3600 seconds/hour) and minutes (60 seconds/minute). The remaining seconds are the seconds. The function then returns a string with the number of days, hours, minutes, and seconds.