For simple back-of-the-evelope stats like a saving calculator, don’t you just need to subtract inflation from expected returns to get the number? If you’re exp

For simple back-of-the-evelope stats like a saving calculator, don’t you just need to subtract inflation from expected returns to get the number? If you’re expecting 7% returns and 3% inflation, just enter in 4% returns and then you’ll see the final estimate in “inflation corrected” today’s dollars. Right?