Here's an offtopic thing which annoys me and many people do wrong. It is important to do significant figures right.

2.28 GW is the most you should ever write with that calculation. What you wrote went down to hundredths of a watt (if I can count).

Nobody should care about the third significant figure in such a comparison, much less the twelfth. The second digit is even of questionable accuracy. Strict significant figure rule following isn't important in casual contexts, but deciding which digits are actually relevant is imporant. Is accounting for leap days really important here?

Also, the output is roughly the installed maximum capacity of the Hoover dam, but about 5 times larger than it's actual yearly production.