The original formulation of the machine just operates on a tape, the closest thing to an output it has is moving the tape into a particular state (such as writi

The original formulation of the machine just operates on a tape, the closest thing to an output it has is moving the tape into a particular state (such as writing down the digits of the calculated function on successive cells of the tape). But there's no "output" function to spit out a number. You can just tack that onto the specification if you want, but it doesn't change the power of the device really.