Some students play games in groups, with one more student in each group of 5; and one student remaining in each group of 6. Do you know how many students are at least playing games?
一些学生分组做游戏，每组5人多一人；每组6人也余下1人，你知道最少有多少名学生在做游戏吗？
<gadget id="calculator">5 * 6</gadget>
<output>30</output>

<gadget id="calculator">30 + 1</gadget>
<output>31</output>

<result>31</result>