The conversion of a 500-dollar Amazon card to Nigerian Naira depends on the current exchange rate. Exchange rates are constantly fluctuating due to various economic factors such as inflation, interest rates, and market demand.

To determine the exact amount in Naira, one would need to check a reliable financial source or a currency exchange platform. These sources provide up-to-date exchange rate information. For example, if the exchange rate is 1 dollar = 410 Naira, then a 500-dollar Amazon card would be worth 500 * 410 = 205,000 Naira.

It's important to note that when converting currency, there may be additional fees involved depending on the method of conversion. Some currency exchange services may charge a commission for their services. So, the final amount received in Naira after converting the 500-dollar Amazon card might be slightly less than the calculated amount based on the exchange rate alone.