code: def check_multiplication_symbol(text):
      u
      err = "typography.symbols.multiplication_symbol"
      msg = u"Use the multiplication symbol ×, not the letter x."
      regex = "[0-9]+ ?x ?[0-9]+"
  
      return existence_check(
          text, [regex], err, msg, max_errors=3, require_padding=False)
docs: u"""Use the multiplication symbol ×, not the lowercase letter x.