When it comes to converting 300 dollars of a Google Play card to Nigerian naira, several factors come into play. Exchange rates are constantly fluctuating, which means the amount of naira you'll get for 300 dollars can vary from day to day.

To determine the exact amount, you need to check with a reliable currency exchange source. These sources usually provide up-to-date exchange rates based on the current market situation. For example, if the exchange rate is favorable, you might get a relatively good amount of naira in return for your 300 dollars.
It's important to note that different exchange platforms may offer slightly different rates. So, it's advisable to compare rates from multiple sources to ensure you're getting the best deal. This will help you maximize the value of your 300 dollars when converting it to naira today.