Dongdong is 12 years old this year, and his father's age is more than three times his age. 4 years old, how old is his father this year?
冬冬今年12岁，爸爸的年龄是他的3倍多4岁，爸爸今年多少岁．
<gadget id="calculator">12 * 3</gadget>
<output>36</output>

<gadget id="calculator">36 + 4</gadget>
<output>40</output>

<result>40</result>