First of all: how do you think voter turnout is calculated?
Second of all: do you believe the denominator in this equation (the number of registered voters) stays the same every four years?

You seem to be operating under this assumption that the total amount of votes is calculated in a different way other than adding up all the votes. How does that work? Show me where you got this number. You're just saying things with zero links to any actual data.

I don't know and I don't care.
Elections are not secure and I've never voted in one.