Li Dapeng's age in 1988 is equal to the sum of the digits of the year he was born in. How old is Li Dapeng this year?
李大朋在1988年的年龄等于他出生那一年的年号的各位数字之和，李大朋今年多少岁．
<gadget id="calculator">2_013 - 1_966</gadget>
<output>47</output>

<result>47</result>