The sum of the ages of Wang Ming and his mother this year is 49 years old. In a year, what is the sum of their ages?
王明和妈妈今年的年龄和是49岁，再过a年，两人的年龄和是多少．
<gadget id="calculator">49 + 2</gadget>
<output>51</output>

<result>51</result>