Consider three operations are defined as such given below :

'#' means multiplying given number three times to itself

'&' means to give result as the sum of digits of the given number 

'*' means reversing the digit of the number.

Let us take a number '21' in which operations are to be performed in the sequence given below :

 '*' → '#' → '*' → '&' → '#'

Then the result of the sequence performed will be -