def calculate_capacitor_capacity(voltage, farads):
    joules = (farads * voltage**2) // 2
    return joules // 3600


def calculate_pack_capacity(cells, cell_voltage, farads):
    return calculate_capacitor_capacity(cells * cell_voltage, farads / cells)


def calculate_pack_capacity2(cells, cell_voltage, farads, cell_cost):
    capacitor_capacity = calculate_capacitor_capacity(
        cells * cell_voltage, farads / cells
    )
    return capacitor_capacity, cell_cost * cells


def main():
    watt_hours = calculate_pack_capacity(cells=10, cell_voltage=2.7, farads=500)
    print(f"{watt_hours=}")
    print(f"{watt_hours*16=}")
    watt_hours = calculate_pack_capacity(cells=1, cell_voltage=2.7, farads=5000)
    print(f"{watt_hours=}")

    watt_hours, cost = calculate_pack_capacity2(
        cells=10,
        cell_voltage=2.7,
        farads=3000,
        cell_cost=11.60,
    )
    print(f"{watt_hours=}")
    print(f"{cost=}")


if __name__ == "__main__":
    main()