Class 6 (A) organizes students to do sanitation, with 6 people in each group or 9 people in each group, which happens to be no more or less.
六(甲)班组织同学搞卫生，每组6人或每组9人，都正好不多不少，搞卫生的同学至少有多少人．
<gadget id="calculator">3 * 2 * 3</gadget>
<output>18</output>

<result>18</result>