The nominal return (9%) is: 40000 * (1.09 ^ 70) = $16,669,203. The first calculation uses 7%. It is the real return. You'll actually have $16m, but the purcha

The nominal return (9%) is: 40000 * (1.09 ^ 70) = $16,669,203. The first calculation uses 7%. It is the real return. You'll actually have $16m, but the purchasing power would be $4.5m in 2021 dollars.