There are 50-60 students in Class 1 of Grade 5. In science class, the teacher divides the class into several groups to do experiments. If there are 3 students in every group of 4, if there are 4 students in every group of 5, and if there are 5 students in every group of 6, how many students are there in the fifth grade class?
五年级一班全班人数有50～60人．在上科学课的时候，老师把全班同学分成若干个小组做实验．如果每4人一组还余3人，如果每5人一组还余4人，如果每6人一组还余5人，五年级一班共有多少人？
<gadget id="calculator">2 * 6 * 5</gadget>
<output>60</output>

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

<result>59</result>