When students in a certain class are doing exercises, they can be lined up in a row of 6 or 7, and it is just finished. What is the minimum number of students in this class?
某班学生做操时，排成6人一行或者排成7人一行都正好排完，这个班最少有多少人．
<gadget id="calculator">6 * 7</gadget>
<output>42</output>

<result>42</result>