redef fun *(i) is intern

	redef fun *(i) is intern

	redef fun *(i) is intern

	redef fun *(i) is intern

	redef fun *(i) is intern

    #     assert("3/2".to_r * 2.to_r == 3.to_r)
    redef fun *(r) do
        var res = new NativeMPQ
        val.mul(res, r.val)
        return new Ratio(res)
    end

	redef fun *(i) is intern

	redef fun *(i) is intern

    #     assert(2.to_bi * 2.to_bi == 4.to_bi)
    redef fun *(i) do
        var res = new NativeMPZ
        val.mul(res, i.val)
        return new BigInt(res)
    end

	redef fun *(i) is intern