A total of 40 students participated in the mid-semester math test in Class 51, and the average score was 87.2 points. After the teacher handed out the papers, a student pointed out that his math score was undercounted by 10 points. So what is the actual average score of the whole class in this math test? (Write at least two solutions)
五1班数学期中测验，共40人参加，平均得分是87.2分，老师发卷后，有一名学生指出他的数学得分少算了10分．那么这次数学测验全班的实际平均分是多少分？(至少写出两种解答方法)
<gadget id="calculator">87.2 * 40</gadget>
<output>3_488</output>

<gadget id="calculator">3_488 + 10</gadget>
<output>3_498</output>

<gadget id="calculator">3_498 / 40</gadget>
<output>1_749/20 = around 87.45</output>

<result>1_749/20 = around 87.45</result>