The exchange rate between the US dollar and the Nigerian naira is constantly fluctuating. To determine how much a 100-dollar Google Play card is in naira, one needs to check the current exchange rate.

Exchange rates can be obtained from various financial sources such as banks, online currency exchange platforms, or financial news websites. These rates are influenced by factors like economic conditions, interest rates, and geopolitical events.
Once the exchange rate is known, multiplying it by 100 will give the approximate value of the 100-dollar Google Play card in naira. For example, if the exchange rate is 400 naira per dollar, then a 100-dollar card would be worth 40,000 naira. However, it's important to note that this is just an estimate and the actual amount may vary slightly depending on the specific exchange rate at the time of conversion.