code: 
  
  
  
  
  '''simple docstring'''
  
  
  
  
  
  import decimal
  
  
  def 				UpperCamelCase	(  ):
  
  
  
  
     '''simple docstring'''
  
     SCREAMING_SNAKE_CASE__			:				Tuple       						= 0
     SCREAMING_SNAKE_CASE__			:				Dict       						= decimal.Context(prec=1_05   )
     for i in range(2	,     1_00   ):
        SCREAMING_SNAKE_CASE__			:				Optional[Any]       						= decimal.Decimal(snake_case   )
        SCREAMING_SNAKE_CASE__			:				str       						= number.sqrt(snake_case   )
        if len(str(snake_case   )   ) > 1:
           answer += int(str(snake_case   )[0]   )
           SCREAMING_SNAKE_CASE__			:				int       						= str(snake_case   )[2:1_01]
           answer += sum(int(snake_case   ) for x in sqrt_number_str   )
     return answer
  
  
  if __name__ == "__main__":
         import doctest
  
         doctest.testmod()
         print(F"{solution() = }")
  
  
style_context: 
  
  
  
  
  '''simple docstring'''
  
  
  
  
  
  lowercase__			=	{
      '''+''': lambda x, y: x + y,
      '''-''': lambda x, y: x - y,
      '''*''': lambda x, y: x * y,
      '''/''': lambda x, y: x / y,
  }
  
  
  def 				UpperCamelCase	(  snake_case   ):
  
  
  
  
     '''simple docstring'''
  
     return c.isdigit()
  
  
  def 				UpperCamelCase	(  snake_case   ):
  
  
  
  
     '''simple docstring'''
  
     SCREAMING_SNAKE_CASE__			:				Union[str, Any]       						= []
  
     # iterate over the string in reverse order
     for c in expression.split()[::-1]:
        # push operand to stack
        if is_operand(snake_case   ):
           stack.append(int(snake_case   )   )
  
        else:
           # pop values from stack can calculate the result
           # push the result onto the stack again
           SCREAMING_SNAKE_CASE__			:				Dict       						= stack.pop()
           SCREAMING_SNAKE_CASE__			:				Any       						= stack.pop()
           stack.append(calc[c](snake_case	,     snake_case   )   )
  
     return stack.pop()
  
  
  # Driver code
  if __name__ == "__main__":
         lowercase__			=	'''+ 9 * 2 6'''
         print(evaluate(test_expression))
  
         lowercase__			=	'''/ * 10 2 + 4 1 '''
         print(evaluate(test_expression))
  
  