Xiaoguang is 9 years older than Xiaoliang this year, and 10 years later, twice Xiaoguang's age is equal to 3 times Xiaoliang's age, so what is Xiaoguang's age this year?
今年小光比小亮的年龄大9岁，10年后小光年龄的2倍与小亮年龄的3倍相等，那么小光今年的年龄是多少岁．
<gadget id="calculator">19 * 2</gadget>
<output>38</output>

<gadget id="calculator">10 * 3</gadget>
<output>30</output>

<gadget id="calculator">38 - 30</gadget>
<output>8</output>

<gadget id="calculator">3 - 2</gadget>
<output>1</output>

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

<gadget id="calculator">8 + 9</gadget>
<output>17</output>

<result>17</result>