The formula “charge = capacitance * voltage” is only correct for batteries. When you load a capacitor, the voltage isn’t constant, it starts at zero and ends at the maximum (e.g. 400V). So you have to form the integral of the voltage-charge-graph, which leads you to the easy formula: charge = 0.5 * capacitance * voltage . So you get a charge of Q = 0,0164
I forgive you, because you are a victim of the american educational system. I’m so sorry for you!
