Mining profitability calculation

[gucci gang]

Please ! Someone can tell me how can I calculate the number of mined coins per day, just based on the indicator of pool.

Example: My personal hash is 50 GH/s and I want to mine Polis coin with Block reward is 4.

So what formula can I use to find out the number of coins per day and the money I can get per day?

Thanks a lot!