Simplified example for a non-debt phase: say you have 1 $GSCARAB staked out of 10 total $GSCARABs staked in Temple, so you will get 10% of the total $SCARAB emissions.
So, for this example we are assuming that there is a total circulating supply of 10,000 $SCARAB, the current expansion rate is at 4%, and therefore 400 $SCARAB will be emitted. You would get ((0.04 * 10000) * 0.8) * (1/10) = 32 $SCARAB. With current regulations, this is the distribution breakdown: -80% of printed $SCARAB goes to $GSCARAB stakers. -15% goes to DAO-fund. -5% goes to the devs.
Formula to calculate your rewards: ((ExpansionRate * CirculatingScarabSupply) * 0.8) * (YourGSCARABStake/TotalGScarabStaked)
This will vary constantly as the APR in the boardroom fluctuates, along with other variables such as the price of $SCARAB.
For a quick estimation, however, you can do the following:
1) Take the total APR shown in the temple, and divide that by 365 to get the daily APR. (In this example, we will say the daily APR is 5%.)
2) Multiply that daily APR by the current market price of the total GScarab you have staked to see what your daily rewards are.(In this example, we have 5 Gscarab, each worth $500, for a total amount staked of $2500. Your daily return is $2500 * .05, which comes out to $125/day.)
3)Take your initial buy-in price for GScarabs, and divide it by your daily rewards. If you bought these 5 Gscarabs at a higher price of $700, for example, in the current market conditions you will recover your initial investment ($3500) in 3500/125 = 28 days.
The more TVL in the pool, the less APR (there's more people getting the same piece of the pie), but the higher the price of the reward (the pie) the higher the APR (better quality of pie). In other words, although the same rewards are diluted across more investors, if those rewards have a higher dollar value because of the increase in TVL, then it can actually lead to a higher APR as well.