Junjun is 11 years old this year, his mother is 2 years younger than 3 times of Junjun's age, and his grandmother is 3 years younger than twice his mother's age. How old is grandma?
军军今年11岁，妈妈的年龄比军军年龄的3倍少2岁，奶奶的年龄比妈妈年龄的2倍少3岁．奶奶今年几岁？
<gadget id="calculator">11 * 3</gadget>
<output>33</output>

<gadget id="calculator">33 - 2</gadget>
<output>31</output>

<gadget id="calculator">31 * 2</gadget>
<output>62</output>

<gadget id="calculator">62 - 3</gadget>
<output>59</output>

<result>59</result>