An An and her father were 34 years old together two years ago. Next year, her father will be four times An An's age. How old is An An this year?
安安和爸爸两年前一共34岁，明年爸爸的年龄刚好是安安的4倍，安安今年多少岁．
<gadget id="calculator">3 + 3 + 34</gadget>
<output>40</output>

<gadget id="calculator">1 + 4</gadget>
<output>5</output>

<gadget id="calculator">40 / 5</gadget>
<output>8</output>

<gadget id="calculator">8 - 1</gadget>
<output>7</output>

<result>7</result>