def multiply(traj):
z = traj.x * traj.y<EOL>traj.f_add_result('<STR_LIT:z>', z, comment='<STR_LIT>')<EOL>
Example of a sophisticated numerical experiment
    that involves multiplying two integer values.

    :param traj:
        Trajectory containing the parameters in a particular
        combination, it also serves as a container for results.