Xiaohong is 8 years old this year, and Xiaoqiang is 14 years old. How many years later, the combined age of Xiaohong and Xiaoqiang will be 40 years old.
小红今年8岁，小强14岁，多少年后小红和小强的岁数和是40岁．
<gadget id="calculator">8 + 14</gadget>
<output>22</output>

<gadget id="calculator">40 - 22</gadget>
<output>18</output>

<gadget id="calculator">18 / 2</gadget>
<output>9</output>

<result>9</result>