Students in a certain class are divided into groups to engage in extracurricular activities. They are divided into groups of 4, 5 or 6. The number of students is just enough. How many students should there be at least in this class?
某班学生分组搞课外活动，分成4人一组、5人一组或6人一组，人数都恰好无余，这个班最少有学生多少人？
<gadget id="calculator">2 * 2 * 3 * 5</gadget>
<output>60</output>

<result>60</result>