There are 3 people in Xiaoling's family. It is known that her father is 4 years older than her mother. This year, her mother's age is 4 times that of Xiaoling's. Four years ago, the age of the three members of the family together was 64. How old is Xiaoling this year?
小玲家一共有3个人，已知爸爸比妈妈大4岁，今年妈妈的年龄是小玲的4倍，4年前全家3个人的年龄和在一起是64岁，小玲今年多少岁．
<gadget id="calculator">4 * 3</gadget>
<output>12</output>

<gadget id="calculator">64 + 12</gadget>
<output>76</output>

<gadget id="calculator">76 - 4</gadget>
<output>72</output>

<gadget id="calculator">4 + 4 + 1</gadget>
<output>9</output>

<gadget id="calculator">72 / 9</gadget>
<output>8</output>

<result>8</result>