Aunt Wang's age 5 years ago is equal to Xiaoli's age 7 years later, and the sum of Xiaoli's age 3 years ago plus Aunt Wang's age 4 years ago is 35 years old. How old is Xiao Li this year?
王阿姨5年前的年龄等于小丽7年后的年龄，小丽3年前的年龄加上王阿姨4年前的年龄的和是35岁．小丽今年几岁？
<gadget id="calculator">35 - 5 - 7</gadget>
<output>23</output>

<gadget id="calculator">3 + 4 + 23</gadget>
<output>30</output>

<gadget id="calculator">1 + 1</gadget>
<output>2</output>

<gadget id="calculator">30 / 2</gadget>
<output>15</output>

<result>15</result>