The average score of the first test in Class 61 was 87.3 points. After re-examination, it was found that Li Xiaoli's 87 points were mistakenly calculated as 78 points. After recalculation, the average score of this class is 87.48 points. How many people are there in this class?
六1班一次考试的平均成绩是87.3分，经过复查发现将李晓莉的87分误看作了78分计算．经过重新计算，该班的平均成绩是87.48分，这个班有多少人？
<gadget id="calculator">87 - 78</gadget>
<output>9</output>

<gadget id="calculator">87.48 - 87.3</gadget>
<output>0.18</output>

<gadget id="calculator">9 / 0.18</gadget>
<output>50</output>

<result>50</result>