“How are you?” is “Как дела?” (“Kak dela?”) in Russian. You can emphasize “Как дела на работе?”. It means “How is work going?”. This question can be used with friends and acquaintances. If you are addressing a person in a formal situation, it would be better to say, “Как у Вас дела?” (“Kak u Vas dela?”). You can also ask “Как обстоят дела?” (“Kak obstoyat dela?”) or “Как все складывается?” (“Kak vse skladyvaetsya?”).