Xiaofang is 15 years old this year, and her age 3 years ago is the same as Xiaoyun's age 2 years later. How old is Xiaoyun this year?
小芳今年15岁，她3年前的年龄与小云2年后的年龄相等．小云今年多少岁．
<gadget id="calculator">15 - 3 - 2</gadget>
<output>10</output>

<result>10</result>