You’re thinking about it the wrong way, binary is how *we* understand how *computers* work. A computer has no concept of a 1 or 0, all it “knows” is high and low voltage going into its transistors. Each transistor takes a voltage in and opens or closes a switch for another wire depending on that voltage. You then stack ~~trillions~~billions of these transistors in such a way that humans can control the input voltages (typing a key, clicking a mouse, etc) and the layers and layers of transistors feed the correct voltage at the end that we’re looking for. Those final voltages control things like the monitor and speakers.
The computer doesn’t know what it’s doing, all it knows is how to feed voltages through it’s circuits, which we humans represent as 1 (high voltage) or 0 (low voltage)
Edit: apparently it’s billions of them, not trillions
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