Calculate the annual electrical energy output (E_out).

Step 1: Calculate the annual electrical energy output ($E_{out}$).
The power station capacity is $915 \text{ MW}$, the load factor is $72.5\%$, and the operating hours per year are $365 \text{ days/year} \times 24 \text{ hours/day} = 8760 \text{ hours/year}$.

$$E_{out} = \text{Capacity} \times \text{Load Factor} \times \text{Operating Hours per Year}$$ $$E_{out} = 915 \text{ MW} \times 0.725 \times 8760 \text{ hours}$$ $$$$