The year is 2004, the sum of the ages of the parents (integer) is 78, the sum of the ages of the brothers (integer) is 17, and four years later (in 2008), the age of the father is 4 times that of the younger brother, and the age of the mother is that of the older brother 3 times, then when the age of the father is 3 times the age of the elder brother, how many years is it?
今年是2004年，父母的年龄(整数)和是78岁，兄弟的年龄(整数)和是17岁，四年后(2008年)，父亲的年龄是弟弟的4倍，母亲的年龄是哥哥的3倍，那么当父亲的年龄是哥哥年龄的3倍时是公元多少年．
<result>2_009</result>