Xiao Ming is 13 years old this year. He is a dog. His father is also a dog. How old might he be this year?
小明今年13岁，属狗，他的爸爸也属狗，今年可能是多少岁．
<gadget id="calculator">12 * 2</gadget>
<output>24</output>

<gadget id="calculator">24 + 13</gadget>
<output>37</output>

<result>37</result>