The sum of the ages of two students is 20 years old, and the difference between them is 2 years old. How old will the older student be 5 years from now?
两个学生的年龄和是20岁，而他们之间相差2岁．请问年龄较大的学生5年后，他的年龄是多少岁．
<gadget id="calculator">20 + 2</gadget>
<output>22</output>

<gadget id="calculator">22 / 2</gadget>
<output>11</output>

<gadget id="calculator">11 + 5</gadget>
<output>16</output>

<result>16</result>