Use a series circuit first, because the current is the same (preferably the resistance is the same).

Or a parallel circuit with equal branch resistances (not recommended, because the total resistance of the circuit will become smaller, so a short circuit will occur, so a protective resistor should be connected to the main line, but it will cause unnecessary power consumption).

Secondly, the connected appliances are all resistance wires (not nonsense, tell you how to draw)

By the way, do you want to make your own oven?