The average score of Xiao Ming's previous English tests was 86. This time, he needs to score 100 points in order to raise the average score to 88. This is the first test.
小明前几次英语考试平均成绩是86分，这次考试要得100分，才能使平均成绩提高到88分，这是第多少次考试．
<gadget id="calculator">100 - 86</gadget>
<output>14</output>

<gadget id="calculator">88 - 86</gadget>
<output>2</output>

<gadget id="calculator">14 / 2</gadget>
<output>7</output>

<result>7</result>