The exchange rate between the US dollar and the Nigerian naira fluctuates constantly. To determine how much a 25-dollar Play Store gift card is in naira, one needs to check the current exchange rate.

Typically, financial institutions and online currency exchange platforms provide the most accurate exchange rates. By looking up the latest rate, you can calculate the equivalent amount in naira. For example, if the exchange rate is 1 dollar = x naira, then 25 dollars would be 25 times x naira.
It's important to note that exchange rates can change due to various factors such as economic conditions, central bank policies, and market forces. So, it's advisable to refer to reliable sources for the most up-to-date rate to get an accurate conversion of the 25-dollar Play Store gift card into naira.