Xiaohuan bought 3 computer games, the cheapest is 13 yuan, and the most expensive is 20 yuan. How much do these 3 computer games cost? how much
小欢买了3个电脑游戏，最便宜的为13元，最贵的为20元，这3个电脑游戏大约要多少元？多少元
<result>50</result>