Obviously 2 years older than Yuhua and 4 years younger than Wenqiang. If Yu Hua is M years old this year, how old is Wen Qiang this year M+?
明明比雨花大2岁，比文强小4岁．如果雨花今年是M岁，文强今年是M+多少岁．
<gadget id="calculator">2 + 4</gadget>
<output>6</output>

<result>6</result>