def dim_mul(dims1, dims2):
    """Create a new dimensionality for the multiplication of dims1 by dims2.

    :param dims1: Numerator dimensions.
    :type dims1: ``tuple``
    :param dims2: Other numerator dimensions.
    :type dims2: ``tuple``
    :rtype: ``tuple``
    """
    return (
        dims1[0] + dims2[0],
        dims1[1] + dims2[1],
        dims1[2] + dims2[2],
        dims1[3] + dims2[3],
        dims1[4] + dims2[4],
        dims1[5] + dims2[5],
        dims1[6] + dims2[6],
    )