There is a kid named Xiao Ming. He is 11 years old and belongs to the dog. But there is an old man who is also a dog. How old is this old man?
有一位小朋友叫小明，他今年11岁，属狗，可有一位老爷爷他也属狗，这位老爷爷今年可能是多少岁．
<gadget id="calculator">12 * 4</gadget>
<output>48</output>

<gadget id="calculator">48 + 13</gadget>
<output>61</output>

<result>61</result>