Capacitors - 1

It is required to construct a $10 µF$ capacitor which can be connected across a $200 V$ battery. Capacitors of capacitance $10 µF$ are available but they can withstand only $50 V$ . Design a suitable combination.

$X$ – Number of capacitors in series in a row

$Y$ – Number of Rows

Give your as product of $X$ & $Y$ .