A capacitor with a capacity of 20 μF is charged to a voltage of 400 V. A capacitor with a capacity of 1 microfarad is connected to it, as a result of which the latter is charged. Then, having disconnected this capacitor, charge in the same way a second capacitor with the same capacitance (1 μF), a third, etc. Then the capacitors are connected in series. What is the maximum voltage that can be obtained this way?

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