Grandpa is 60 years older than Xiao Ming, and grandma is 57 years older than Xiao Ming. The sum of the ages of grandpa and grandma is 127 years. What is Xiao Ming's age?
爷爷比小明大60岁，奶奶比小明大57岁，爷爷与奶奶的年龄之和是127岁，小明的年龄是多少岁．
<gadget id="calculator">60 - 57</gadget>
<output>3</output>

<gadget id="calculator">127 + 3</gadget>
<output>130</output>

<gadget id="calculator">130 / 2</gadget>
<output>65</output>

<gadget id="calculator">65 - 60</gadget>
<output>5</output>

<result>5</result>