If the age of a young man this year (2013) is exactly equal to the sum of the numbers of the year of birth, then what is the age of this young man this year?
一个年轻人今年(2013年)的岁数正好等于出生年份数字之和，那么这位年轻人今年的岁数是多少岁．
<gadget id="calculator">2 + 0 + 1 + 3</gadget>
<output>6</output>

<result>6</result>