Xiaoming's mother's ID number is 6101131197410232923. By the end of October 2014, how old is Xiaoming's mother?
小明妈妈的身份证号码为6101131197410232923，到2014年10底，小明的妈妈是多少周岁．
<gadget id="calculator">2_014 - 1_974</gadget>
<output>40</output>

<result>40</result>