How much is 1 dollar now in Binance?

Excuse me, could you please clarify for me the current exchange rate of 1 dollar on the Binance platform? I'm trying to make a transaction and need to know the exact amount of cryptocurrency I'll receive for my dollar. Is there a specific way to check this information on Binance's website or mobile app? Additionally, is there any fluctuation in the exchange rate that I should be aware of before making my trade? Thank you in advance for your assistance.