A class organizes student activities. There are 3 students in a group of 4, 4 students in a group of 5, and 1 student in a group of 6. How many students are there in this class?
某班组织学生活动，4人一组余3人，5人一组余4人，6人一组差1人，这个班共有多少人．
<gadget id="calculator">2 * 2 * 3 * 5</gadget>
<output>60</output>

<gadget id="calculator">60 - 1</gadget>
<output>59</output>

<result>59</result>