My mother is 35 years old this year, and Xiaoling is 8 years old this year. When Xiaoling was 20 years old, how much older was her mother than Xiaoling?
妈妈今年35岁，小玲今年8岁．小玲20岁时，妈妈比小玲大多少岁．
<gadget id="calculator">35 - 8</gadget>
<output>27</output>

<result>27</result>