Trying to impress your Russian in-laws or trading pins at the Olympics, you need to know "how do you say good-bye in Russian". As in many languages there are often multiple ways to say "so long" and Russian is no different. The most common ways are the formal version - dahsveedahneeyah and the more familiar - pah-kah. You can find more information here:
. http://learningrussian.net/vocabulary/russian-phrases/how-to-say-good-bye-in-russian.php