The sum of the ages of the father and son is 60 years old. Eight years ago, the age of the father was three times that of the son. How old is the father this year?
父子年龄之和是60岁，8年前父亲的年龄是儿子的3倍，父亲今年多少岁．
<gadget id="calculator">2 * 8</gadget>
<output>16</output>

<gadget id="calculator">60 - 16</gadget>
<output>44</output>

<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<gadget id="calculator">44 / 4</gadget>
<output>11</output>

<gadget id="calculator">11 * 3</gadget>
<output>33</output>

<gadget id="calculator">33 + 8</gadget>
<output>41</output>

<result>41</result>