In a certain class, the average score of the mathematics test was 86.5. Later, it was found that Xiaogang’s score was 96, which was mistakenly recorded as 69. After recalculation, the average score was 87.1. How many students are there in this class?
某班统计数学考试成绩，平均成绩是86.5分，后来发现小刚的成绩是96分，被错记为69分，重新计算后，平均成绩是87.1分，那么这个班有多少名学生．
<gadget id="calculator">96 - 69</gadget>
<output>27</output>

<gadget id="calculator">87.1 - 86.5</gadget>
<output>0.6</output>

<gadget id="calculator">27 / 0.6</gadget>
<output>45</output>

<result>45</result>