A certain class scored an average of 88 points in a math test, only Xiao Ming did not take the test due to illness. The next day his make-up test score was 79 points. After adding Xiao Ming's score, the average score of the class was 87.8 points. How many students are there in this class?
某班在一次数学考试中平均分为88分，只有小明因病没有参加考试．第二天他补考的成绩是79分，加上小明的成绩后，该班的平均分是87.8分．这个班共有学生多少人．
<gadget id="calculator">88 - 79</gadget>
<output>9</output>

<gadget id="calculator">88 - 87.8</gadget>
<output>0.2</output>

<gadget id="calculator">9 / 0.2</gadget>
<output>45</output>

<result>45</result>