There are more than 30 students participating in volunteer activities. They can be divided into groups of 6 or 9, and all of them are divided exactly. How many of these students are there in total?
有30多个学生参加志愿者活动，可以分成6人一组，也可以分成9人一组，都正好分完，这些学生的总人数有多少人．
<gadget id="calculator">3 * 2 * 3</gadget>
<output>18</output>

<gadget id="calculator">18 * 2</gadget>
<output>36</output>

<result>36</result>