It is known that Xiaoqiang was born 6 years earlier than Xiaogang, and Xiaoqiang's age this year is 3 years less than twice Xiaogang's age, so what is the sum of the ages of the two people this year?
已知小强比小刚早出生6年，今年小强的年龄是小刚年龄的2倍少3岁，那么两人今年的年龄之和是多少岁．
<gadget id="calculator">3 + 6</gadget>
<output>9</output>

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

<gadget id="calculator">9 / 1</gadget>
<output>9</output>

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

<gadget id="calculator">18 - 3</gadget>
<output>15</output>

<gadget id="calculator">9 + 15</gadget>
<output>24</output>

<result>24</result>