code: 
  
  
  
  
  '''simple docstring'''
  
  
  
  
  
  import math
  
  
  def 				UpperCamelCase	(  snake_case   ):
  
  
  
  
     '''simple docstring'''
  
     if 1 < number < 4:
        # 2 and 3 are primes
        return True
     elif number < 2 or number % 2 == 0 or number % 3 == 0:
        # Negatives, 0, 1, all even numbers, all multiples of 3 are not primes
        return False
  
     # All primes number are in format of 6k +/- 1
     for i in range(5	,     int(math.sqrt(snake_case   ) + 1   )	,     6   ):
        if number % i == 0 or number % (i + 2) == 0:
           return False
     return True
  
  
  def 				UpperCamelCase	(  snake_case = 2_00_00_00   ):
  
  
  
  
     '''simple docstring'''
  
     return sum(num for num in range(3	,     snake_case	,     2   ) if is_prime(snake_case   )   ) + 2 if n > 2 else 0
  
  
  if __name__ == "__main__":
         print(F"{solution() = }")
  
  
style_context: 
  
  
  
  
  '''simple docstring'''
  
  
  
  
  
  def 				UpperCamelCase	(  snake_case = 99_80_01   ):
  
  
  
  
     '''simple docstring'''
  
     for number in range(n - 1	,     99_99	,     -1   ):
        SCREAMING_SNAKE_CASE__			:				int       						= str(snake_case   )
  
        # checks whether 'str_number' is a palindrome.
        if str_number == str_number[::-1]:
           SCREAMING_SNAKE_CASE__			:				Any       						= 9_99
  
           # if 'number' is a product of two 3-digit numbers
           # then number is the answer otherwise fetch next number.
           while divisor != 99:
              if (number % divisor == 0) and (len(str(number // divisor   )   ) == 3.0):
                 return number
              divisor -= 1
     raise ValueError('''That number is larger than our acceptable range.'''   )
  
  
  if __name__ == "__main__":
         print(F"{solution() = }")
  
  