The exchange rate between the US dollar and the Nigerian naira fluctuates constantly. To determine how much a $300 Xbox Live gift card is in naira, one needs to check the current exchange rate.

Exchange rates are influenced by various factors such as economic conditions, central bank policies, and global market trends. This means that the value in naira for a $300 gift card can change from day to day.

To find the exact amount, one can look at financial news platforms, online currency converters, or contact a local bank or financial institution. They will be able to provide the most accurate conversion based on the prevailing exchange rate at that time.