My father is 43 years old this year, and his three sons are 14, 11, and 6 years old. How many years later, the age of the father is exactly equal to the sum of the ages of the three sons.
今年爸爸43岁，三个儿子分别是14、11、6岁．多少年后，爸爸的年龄恰好等于三个儿子年龄之和．
<gadget id="calculator">14 + 11 + 6</gadget>
<output>31</output>

<gadget id="calculator">43 - 31</gadget>
<output>12</output>

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

<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<result>6</result>