Is there one international airport in Beijing? How much will it cost by taxi from the airport to hostel at 22 Shanxi Xiang,Qianmen,Beijing

How much will it cost me by taxi from the airport to my hostel at 22 Shanxi Xiang,Qianmen,Beijing? Am from Malaysia and arriving Beijing at 4pm and is it only 1 international airport which is call Capital Airport or what. I saw in the map lots of airports and wonder which airport will MAS Airline arrive at?