def round_to_multiple(number, size):
  """Rounds a number up to nearest multiple of another number.
  Args:
    number: The number to round up.
    size: The multiple to round up to.
  Returns:
    If |number| is a multiple of |size|, returns |number|, otherwise
    returns |number| + |size|.
  """
  remainder = number % size
  if remainder == 0:
    return number
  return number + size - remainder