How many students are there in a class? If there are 5 students in a row, there will be 1 student left, or if there are 6 students in a row, there will be 2 students left. How many students are there in this class at least?
某班级有学生若干人，若5人一排，则余1人，或6人一排，则余2人，这个班至少有多少人．
<gadget id="calculator">5 * 6</gadget>
<output>30</output>

<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">30 - 4</gadget>
<output>26</output>

<result>26</result>