Octal to decimal conversion
def OctalToDecimal(num):
decimal_value = 0
base = 1
while num:
last_digit = num % 10
num = int(num / 10)
decimal_value += last_digit * base
base = base * 8
return decimal_value
octal = 512
print("The decimal value of",octal, " is",OctalToDecimal(octal))