5 years ago, the age of the mother was 7 times that of the daughter. 5 years later, the sum of the ages of the mother and daughter is 52. How old is the daughter this year?
5年前，妈妈的年龄是女儿的7倍，5年后，母女年龄和是52，女儿今年几岁？
<gadget id="calculator">52 - 10 - 10</gadget>
<output>32</output>

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

<gadget id="calculator">32 / 8</gadget>
<output>4</output>

<gadget id="calculator">4 + 5</gadget>
<output>9</output>

<result>9</result>