The red scarf team participated in the activity of learning from Lei Feng. Every group of 6 people or every group of 9 people is just finished, how many people are there at least in this team.
红领巾小队参加学雷锋活动．每6人分一组或每9人分一组都正好分完，这个小队至少有多少人．
<gadget id="calculator">2 * 3 * 3</gadget>
<output>18</output>

<result>18</result>